Verse Analysis¶

Question¶

What does the Bible say about the seventh commandment? Trace the creation foundation of marriage (Gen 2:24 -- "one flesh," pre-Sinai). What does Leviticus 18 say about sexual ethics, and how does its introduction (Lev 18:24-30 -- the Canaanites judged for the same violations) establish the scope? How does Jesus deepen this to lust (Mat 5:27-28) and address divorce (Mat 19:3-9)? What do Paul (1 Cor 6:18-20; Rom 1:26-27), the author of Hebrews (13:4), and Revelation (21:8; 22:15) say?

Verse-by-Verse Analysis¶

A. The Commandment Itself¶

Exodus 20:14¶

Context: The seventh of the ten words spoken by God directly to the assembled people at Sinai. Direct statement: "Thou shalt not commit adultery." Two Hebrew words: lo (negative particle) + tinaaph (Qal Imperfect 2ms of naaph, H5003). The verb naaph specifically denotes violation of the marriage covenant -- sexual relations with another person's spouse. The Qal imperfect with lo functions as an apodictic prohibition ("you shall not"). This is the shortest of all ten commandments. Key observations: The Hebrew verb naaph (H5003) is narrower than zanah (H2181, "fornication/harlotry"). Naaph specifically targets the marriage bond. The LXX translates it with moicheuo (G3431), maintaining the specific marital-infidelity sense. Cross-references: Deu 5:18 is the Deuteronomic parallel (identical except for initial waw-conjunction). Rom 13:9 quotes this commandment verbatim in Greek. Jas 2:11 pairs it with the sixth commandment as exemplars of the law's unity.

Deuteronomy 5:18¶

Context: Moses recounting the Decalogue to Israel on the plains of Moab. Direct statement: "Neither shalt thou commit adultery." Identical verb form (tinaaph, Qal Impf 2ms of naaph). The added waw-conjunction ("and/neither") connects it to the preceding commandments in a continuous series. Key observations: Confirms the exact wording of Exo 20:14. Moses recalls what God spoke directly to the assembly (Deu 5:22).

B. Creation Foundation of Marriage (Pre-Sinai)¶

Genesis 1:27-28¶

Context: The sixth day of creation -- the creation of humanity. Direct statement: God created humanity "male and female" and commanded them to "be fruitful, and multiply." The male-female distinction is established at creation as part of the divine design. Key observations: The creation of humanity as male and female is presented as a deliberate divine act ("in the image of God created he him; male and female created he them"). The blessing and command to "be fruitful, and multiply" presupposes the male-female union as the reproductive and relational pattern.

Genesis 2:18-25¶

Context: A detailed account of the creation of woman and the institution of marriage, prior to the fall and centuries before Sinai. Direct statement: God declares "It is not good that the man should be alone" (v.18). He creates woman from man's rib (vv.21-22). Adam recognizes her as "bone of my bones, and flesh of my flesh" (v.23). The foundational marriage principle follows: "Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh" (v.24). The passage concludes: "And they were both naked, the man and his wife, and were not ashamed" (v.25). Key observations: - Hebrew parsing of Gen 2:24 reveals three sequential actions: yaazov (Qal Impf, "leave" -- father and mother), davaq (Qal Perf, "cleave/cling to" -- his wife), and hayu levasar echad ("become one flesh"). The verb davaq denotes strong, permanent attachment. - The "one flesh" construct (levasar echad) describes the union of husband and wife as a single entity. - This passage predates Sinai by centuries, establishing marriage as a creation ordinance rather than a Mosaic institution. - Jesus quotes Gen 2:24 in Mat 19:4-6 and Mrk 10:6-8 as the authoritative baseline for marriage, appealing to creation ("from the beginning") against Mosaic accommodation. - Paul quotes Gen 2:24 in Eph 5:31 and alludes to it in 1 Cor 6:16. Cross-references: The "one flesh" principle is foundational to the entire biblical sexual ethic. The seventh commandment protects this creation institution. Every subsequent passage on adultery, fornication, and marriage presupposes this foundation.

C. Pre-Sinai Adultery Awareness¶

Genesis 20:1-7¶

Context: Abraham sojourns in Gerar; Abimelech the Philistine king takes Sarah. Direct statement: God warns Abimelech in a dream: "Behold, thou art but a dead man, for the woman which thou hast taken; for she is a man's wife" (v.3). God says He "withheld thee from sinning against me" (v.6) and threatens death if Sarah is not restored (v.7). Key observations: God calls taking another man's wife "sinning against me" -- the moral standard exists before Sinai. Abimelech, a Philistine (not an Israelite), is held accountable. God's direct intervention to prevent adultery demonstrates that the prohibition is not merely an Israelite cultural norm.

Genesis 26:10-11¶

Context: A later Abimelech discovers Isaac has misrepresented Rebekah as his sister. Direct statement: Abimelech says: "One of the people might lightly have lien with thy wife, and thou shouldest have brought guiltiness upon us." He issues a decree: "He that toucheth this man or his wife shall surely be put to death." Key observations: Abimelech recognizes that lying with another man's wife brings "guiltiness" -- the pre-Sinai moral awareness is documented among non-Israelites. The death penalty for this offense is decreed by a Philistine king, not under Mosaic law.

Genesis 38:24¶

Context: Judah learns that his daughter-in-law Tamar has "played the harlot" and is pregnant. Direct statement: "Tamar thy daughter in law hath played the harlot (zanah); and also, behold, she is with child by whoredom (zenut). And Judah said, Bring her forth, and let her be burnt." Key observations: Judah sentences Tamar to death for sexual immorality -- before Sinai. The vocabulary uses zanah (H2181, "harlotry") and zenut ("whoredom"). Judah's own hypocrisy is later exposed (Gen 38:25-26), but the incident demonstrates that sexual immorality was treated as a capital offense before the Mosaic code was given.

Genesis 39:7-12¶

Context: Joseph, enslaved in Egypt, is solicited by Potiphar's wife. Direct statement: Joseph refuses, saying: "how then can I do this great wickedness, and sin against God?" (v.9). He flees the situation (v.12). Key observations: Joseph calls adultery "great wickedness" and "sin against God" -- not merely an offense against Potiphar. This pre-Sinai recognition that adultery is primarily a sin against God parallels Gen 20:6, where God calls it "sinning against me." Joseph's response of fleeing (v.12) anticipates Paul's command to "flee fornication" (1 Cor 6:18).

D. Leviticus 18 -- Sexual Ethics (Full Chapter)¶

Leviticus 18:1-5 (Introduction)¶

Context: God speaks to Moses for Israel. Direct statement: "After the doings of the land of Egypt, wherein ye dwelt, shall ye not do: and after the doings of the land of Canaan, whither I bring you, shall ye not do" (v.3). The framework is established: these are not uniquely Israelite standards but are contrasted with the practices of Egypt and Canaan. Key observations: The repeated phrase "I am the LORD your God" (vv.2,4,5) grounds the sexual ethic in God's identity and authority. The prohibitions are presented as God's "judgments" and "ordinances" (v.4), applicable universally.

Leviticus 18:6-18 (Incest Prohibitions)¶

Direct statement: Thirteen specific prohibitions covering sexual relations with close relatives: mother (v.7), father's wife (v.8), sister (v.9), grandchildren (v.10), half-sister (v.11), aunt by blood (vv.12-13), uncle's wife (v.14), daughter-in-law (v.15), brother's wife (v.16), woman and her daughter (v.17), wife's sister during wife's lifetime (v.18). Key observations: The phrase "uncover nakedness" (galah ervah) is the standard euphemism for sexual intercourse. The range of prohibited relations demonstrates a comprehensive sexual ethic, not merely the narrow prohibition of adultery (naaph).

Leviticus 18:19-23 (Other Prohibitions)¶

Direct statement: Sexual relations during menstruation (v.19); adultery with neighbor's wife (v.20); child sacrifice to Molech (v.21); homosexual acts -- "Thou shalt not lie with mankind, as with womankind: it is abomination" (v.22); bestiality -- "it is confusion" (v.23). Key observations: Verse 20 uses naaph-language for adultery proper. Verse 22 uses the word toevah ("abomination") for homosexual acts. Verse 23 uses tevel ("confusion/perversion") for bestiality. The chapter treats sexual ethics comprehensively: incest, adultery, homosexuality, and bestiality are all prohibited in a single legislative unit.

Leviticus 18:24-30 (Canaanite Judgment -- Universal Scope)¶

Context: The conclusion of the chapter. Direct statement: "Defile not ye yourselves in any of these things: for in all these the nations are defiled which I cast out before you: And the land is defiled: therefore I do visit the iniquity thereof upon it, and the land itself vomiteth out her inhabitants" (vv.24-25). "For all these abominations have the men of the land done, which were before you, and the land is defiled" (v.27). Key observations: This passage states that the Canaanites -- who had no access to the Mosaic code -- were judged for the same sexual violations. The violations are called "abominations" (toevot). The land is described as "vomiting out" its inhabitants because of these sins. The text applies these standards to "any of your own nation, nor any stranger that sojourneth among you" (v.26). This establishes the sexual ethic as universal in scope, not limited to Israel. Cross-references: This connects to the pre-Sinai evidence (Gen 20:1-7; 26:10-11; 38:24; 39:9), where non-Israelites recognized and were held accountable for sexual morality.

E. Penalties for Adultery (OT)¶

Leviticus 20:10-21¶

Context: God prescribes penalties for violations of the Leviticus 18 categories. Direct statement: Adultery with neighbor's wife: both parties put to death (v.10). Lying with father's wife: death (v.11). Daughter-in-law: death (v.12). Homosexual act: death -- "they have committed an abomination" (v.13). Man takes woman and her mother: burned with fire (v.14). Bestiality: death for both (vv.15-16). Incest with sister: "cut off" (v.17). Various other penalties (vv.18-21). Key observations: The death penalty for adultery (v.10) demonstrates the gravity assigned to the seventh commandment's violation. The penalties correspond to the prohibitions of Leviticus 18, forming a unified legislative pair.

Numbers 5:11-29¶

Context: The "jealousy trial" -- a procedure for suspected adultery when there are no witnesses. Direct statement: A husband suspecting his wife of adultery brings her before the priest. A ritual involving "bitter water" is administered. If guilty, her "belly shall swell, and her thigh shall rot" (v.27). If innocent, "she shall be free, and shall conceive seed" (v.28). Key observations: The existence of a formal judicial procedure for suspected adultery indicates the seriousness of the seventh commandment in Israel's legal system. The procedure places the determination in God's hands rather than human testimony.

Deuteronomy 22:13-29¶

Context: Laws governing marriage, virginity, and sexual offenses. Direct statement: False charges of lost virginity: the accuser is fined and may never divorce (vv.13-19). If true, the woman is stoned (vv.20-21). Adultery with a married woman: both die (v.22). Sex with a betrothed virgin in the city: both stoned (vv.23-24). Rape of a betrothed virgin in the field: only the man dies (vv.25-27). Sex with an unbetrothed virgin: the man pays 50 shekels and must marry her, with no right to divorce (vv.28-29). Key observations: Betrothal is treated with the same gravity as marriage -- violating a betrothed woman is called adultery (v.24: "he hath humbled his neighbour's wife"). This demonstrates that the marriage covenant begins at betrothal, not consummation. The distinction between city and field accounts for the possibility of consent vs. force.

Deuteronomy 24:1-4 (Divorce Law)¶

Context: Moses provides a regulation for divorce. Direct statement: A man who finds "some uncleanness" (ervat davar) in his wife may write a bill of divorcement. If she remarries and the second husband dies or divorces her, the first husband may not take her back -- "for that is abomination before the LORD." Key observations: This passage does not command or commend divorce; it regulates an existing practice. Jesus interprets this as a concession "for the hardness of your hearts" (Mat 19:8). The phrase ervat davar ("uncleanness of a thing/matter") was debated among rabbinical schools. The prohibition on remarrying the first husband indicates that divorce causes a permanent alteration in the marital status.

F. Proverbs on Adultery¶

Proverbs 5:1-23¶

Context: Solomon's wisdom instruction to his son. Direct statement: The "strange woman" (zarah) lures with flattery but her end is "bitter as wormwood" and leads to death (vv.3-5). The remedy: "Rejoice with the wife of thy youth" (v.18). "The ways of man are before the eyes of the LORD, and he pondereth all his goings" (v.21). Key observations: The passage presents a positive vision of marital faithfulness (vv.15-19) alongside the warnings. The metaphor of "drink waters out of thine own cistern" (v.15) presents exclusive marital intimacy as the proper counterpart to the adultery prohibition. Verse 21 connects to the seventh commandment's theological basis: God sees all.

Proverbs 6:24-33¶

Context: Continued wisdom instruction. Direct statement: "Lust not after her beauty in thine heart" (v.25) -- an OT anticipation of Jesus' teaching in Mat 5:28. "Whoso committeth adultery with a woman lacketh understanding: he that doeth it destroyeth his own soul" (v.32). "A wound and dishonour shall he get; and his reproach shall not be wiped away" (v.33). Key observations: Verse 25 addresses heart-level desire, not just the physical act -- connecting the seventh commandment to internal intent. Verse 32 describes adultery as soul-destroying. The passage compares the adulterer unfavorably even to a thief (vv.30-31), since the thief at least acts from hunger.

Proverbs 7:1-27¶

Context: A narrative depicting a young man's seduction by the "strange woman." Direct statement: "Her house is the way to hell, going down to the chambers of death" (v.27). Key observations: The extended narrative (vv.6-23) depicts the process of temptation: opportunity, flattery, sensory appeal, and rationalization ("My husband is gone," v.19). The passage emphasizes that adultery leads to death -- "as an ox goeth to the slaughter" (v.22). This supports the eschatological exclusion theme found in Rev 21:8 and 22:15.

G. Prophetic Denunciations¶

Isaiah 57:3-4¶

Context: Isaiah denounces Israel's unfaithfulness. Direct statement: "The seed of the adulterer (naaph) and the whore (zanah)." Key observations: Isaiah combines naaph (adultery proper) with zanah (broader sexual immorality/spiritual harlotry). The prophetic use blends literal and figurative adultery -- spiritual unfaithfulness (idolatry) is described in the language of sexual sin.

Jeremiah 3:1-14¶

Context: Jeremiah uses the divorce law of Deu 24:1-4 as a metaphor for Israel's relationship with God. Direct statement: "Backsliding Israel committed adultery I had put her away, and given her a bill of divorce; yet her treacherous sister Judah feared not, but went and played the harlot also" (v.8). God says: "I am married unto you" (v.14). Key observations: This passage uses the vocabulary of marriage, adultery, divorce, and harlotry to describe the God-Israel relationship. God describes Himself as Israel's husband. Israel's idolatry is called adultery. This figurative usage presupposes the literal meaning of the seventh commandment and extends it to the spiritual realm.

Jeremiah 5:7-8¶

Direct statement: "When I had fed them to the full, they then committed adultery (naaph), and assembled themselves by troops in the harlots' houses." Key observations: Literal and spiritual adultery intertwine in the prophetic indictment.

Jeremiah 7:9-10¶

Direct statement: "Will ye steal, murder (ratsach), and commit adultery (naaph), and swear falsely, and burn incense unto Baal, and walk after other gods...and come and stand before me in this house?" Key observations: Jeremiah's temple sermon lists adultery alongside other Decalogue violations -- stealing, murder, false swearing -- in a sequence echoing the commandments. The text condemns performing religious worship while violating the moral law. Already registered as E380 in the cmd-evidence.db.

Jeremiah 23:10; 29:23¶

Direct statement: "The land is full of adulterers" (23:10). "They have committed adultery with their neighbours' wives" (29:23). Key observations: The prophets consistently identify adultery as one of Israel's characteristic sins that provoked divine judgment.

Ezekiel 16:38,40-41¶

Context: Extended allegory of Jerusalem as an unfaithful wife. Direct statement: "I will judge thee, as women that break wedlock and shed blood are judged" (v.38). "They shall stone thee with stones" (v.40). Key observations: Ezekiel applies the Levitical penalties for adultery (Lev 20:10; Deu 22:22-24) to the nation metaphorically. The penalty for breaking wedlock -- stoning -- is the same as for literal adultery.

Ezekiel 18:5-6¶

Direct statement: The just man "hath not...defiled his neighbour's wife." Key observations: Sexual purity (specifically, not committing adultery) is listed among the markers of a righteous person. This connects the seventh commandment to the broader pattern of righteous living.

Ezekiel 22:9-11¶

Direct statement: "One hath committed abomination with his neighbour's wife; and another hath lewdly defiled his daughter in law; and another in thee hath humbled his sister." Key observations: Multiple categories of sexual sin from Leviticus 18 are listed as actual offenses committed in Jerusalem -- adultery, incest with daughter-in-law, and incest with a sister. The Leviticus 18 categories are not theoretical; they describe real violations.

Hosea 4:1-2,11¶

Direct statement: "By swearing, and lying, and killing, and stealing, and committing adultery (naaph), they break out, and blood toucheth blood" (v.2). Already registered as E379. Key observations: Hosea's list in 4:2 follows the Decalogue order remarkably closely: false swearing (3rd), lying (9th), killing (6th), stealing (8th), adultery (7th). This is one of the clearest OT echoes of the Ten Commandments outside the Pentateuch.

Hosea 7:4¶

Direct statement: "They are all adulterers, as an oven heated by the baker." Key observations: The simile describes the intensity of the people's adulterous passion.

Malachi 2:14-16¶

Context: Malachi addresses the men of Judah who have divorced their wives. Direct statement: "The LORD hath been witness between thee and the wife of thy youth, against whom thou hast dealt treacherously (bagad): yet is she thy companion, and the wife of thy covenant" (v.14). "He hateth putting away" (v.16). Key observations: The verb bagad (H898, "deal treacherously") frames divorce as covenant treachery -- the same vocabulary used for political betrayal and treaty violation. Marriage is called a "covenant" (berith), elevating it to the same covenantal status as God's relationship with Israel. God is described as "witness" to the marriage covenant. God "hateth putting away" (divorce). This passage is foundational for Jesus' teaching on divorce in Mat 19:3-9.

H. Jesus' Teaching¶

Matthew 5:27-28¶

Context: The second antithesis in the Sermon on the Mount -- Jesus quotes and deepens the seventh commandment. Direct statement: "Ye have heard that it was said by them of old time, Thou shalt not commit adultery: But I say unto you, That whosoever looketh on a woman to lust after her hath committed adultery with her already in his heart." Key observations: - Greek parsing: blaspon (Present Active Participle, "one who is looking") + pros to epithumesai (purpose clause with Aorist Active Infinitive, "for the purpose of lusting") + ede emoicheusen (Aorist Active Indicative, "has already committed adultery"). The structure shows: ongoing looking with the purpose of lusting constitutes completed adultery. - Epithumeo (G1937) = "to set the heart upon, desire." The word itself is not inherently negative (cf. Luk 22:15; 1 Tim 3:1), but the purpose clause (pros to + infinitive) specifies sinful intent. - Jesus does not replace the commandment but extends it inward -- from the act to the intent. This is the "magnification" pattern (Isa 42:21). - Proverbs 6:25 ("Lust not after her beauty in thine heart") anticipated this teaching. Cross-references: This parallels Jesus' extension of the sixth commandment from murder to anger (Mat 5:21-22). The pattern: the commandment prohibits the act; Jesus identifies the root attitude.

Matthew 5:29-30¶

Direct statement: "If thy right eye offend thee, pluck it out...if thy right hand offend thee, cut it off...for it is profitable for thee that one of thy members should perish, and not that thy whole body should be cast into hell." Key observations: The severity of the remedy (amputation language) underscores the gravity of the sin. The alternative to radical self-discipline is gehenna ("hell"). This connects to the eschatological warnings in Rev 21:8 and 22:15.

Matthew 5:31-32¶

Context: Immediately following the adultery antithesis, Jesus addresses divorce. Direct statement: "Whosoever shall put away his wife, saving for the cause of fornication (porneia), causeth her to commit adultery: and whosoever shall marry her that is divorced committeth adultery." Key observations: Jesus uses porneia (G4202, broader than moicheia) for the exception clause. Divorce without the porneia ground "causeth her to commit adultery" -- the assumption is that the divorced woman will remarry, and this remarriage constitutes adultery because the first marriage covenant remains in force. The one who marries the divorced woman also "committeth adultery."

Matthew 15:19 / Mark 7:21¶

Direct statement: "Out of the heart proceed evil thoughts, murders, adulteries (moicheia), fornications (porneia), thefts, false witness, blasphemies." Key observations: Jesus distinguishes between adulteries (moicheia, specifically marital infidelity) and fornications (porneia, broader sexual sin). Both originate "out of the heart." This confirms that the seventh commandment addresses the internal as well as the external.

Matthew 19:3-12¶

Context: Pharisees test Jesus on the divorce question. Direct statement: Jesus appeals to Gen 1:27 and 2:24: "He which made them at the beginning made them male and female" and "they twain shall be one flesh" (vv.4-5). "What therefore God hath joined together, let not man put asunder" (v.6). On the Mosaic permission: "Moses because of the hardness of your hearts suffered you to put away your wives: but from the beginning it was not so" (v.8). The ruling: "Whosoever shall put away his wife, except it be for fornication (porneia), and shall marry another, committeth adultery (moichatai)" (v.9). Key observations: - Greek parsing of v.9: hos an + apoluse (Aorist Active Subjunctive, "whoever divorces") + me epi porneia ("not for porneia") + gamese (Aorist Active Subjunctive, "and marries") + allen ("another") + moichatai (Present Middle/Passive Indicative, "commits adultery"). The me epi porneia clause is the exception: divorce "not on the ground of porneia" results in adultery upon remarriage. - Jesus establishes creation (Gen 2:24) as the interpretive baseline and treats Moses' divorce regulation (Deu 24:1-4) as a concession to hardness of heart, not a divine ideal. - "From the beginning it was not so" -- the creation standard preceded and governs the Mosaic accommodation. - The porneia exception clause uses porneia (G4202), not moicheia (G3430). Porneia's broader semantic range (covering all illicit sexual activity) may indicate a broader ground for the exception than simple adultery alone. - Moichatai (G3429, Present M/P Ind 3S) appears specifically in divorce/remarriage contexts.

Mark 10:2-12¶

Context: Parallel account of the divorce discussion. Direct statement: Jesus gives the same teaching but adds in private to his disciples: "Whosoever shall put away his wife, and marry another, committeth adultery against her. And if a woman shall put away her husband, and be married to another, she committeth adultery" (vv.11-12). Key observations: Mark's account has no exception clause. Mark also applies the teaching to a woman who divorces her husband -- recognizing that in Roman law (unlike Jewish law), a woman could initiate divorce.

Luke 16:18¶

Direct statement: "Whosoever putteth away his wife, and marrieth another, committeth adultery: and whosoever marrieth her that is put away from her husband committeth adultery." Key observations: Luke's account also has no exception clause. Like Mark, it presents the teaching as absolute. The marrying of a divorced person is also called adultery.

John 8:1-11¶

Context: The scribes and Pharisees bring a woman "taken in adultery" to Jesus. Direct statement: Jesus says: "He that is without sin among you, let him first cast a stone at her" (v.7). After all accusers depart: "Neither do I condemn thee: go, and sin no more" (v.11). Key observations: Jesus does not dispute that adultery deserves judgment under the law ("Moses in the law commanded us, that such should be stoned," v.5). He does not say adultery is acceptable. He addresses the hypocrisy of the accusers (where is the man? -- both parties should be present per Lev 20:10). His final word is "sin no more" -- the act is identified as sin, and the call is to cease from it.

I. Paul's Teaching¶

Romans 1:24-27¶

Context: Paul describes the descent of the Gentile world into moral corruption after rejecting the knowledge of God. Direct statement: "God gave them up to uncleanness through the lusts of their own hearts, to dishonour their own bodies" (v.24). "Their women did change the natural use into that which is against nature (para phusin)" (v.26). "The men, leaving the natural use of the woman, burned in their lust one toward another; men with men working that which is unseemly, and receiving in themselves that recompence of their error which was meet" (v.27). Key observations: - Greek parsing: para phusin (G3844 + G5449) = "against/contrary to nature." The preposition para with the accusative means "against/contrary to," not merely "alongside." - Phusiken chresin (G5446 + G5540) = "the natural use/function" -- implying a created design for sexual relations. - The structure: women exchanged (metellaxan, G3337, Aorist Active) the natural use; men abandoned (aphentes, G863, Aorist Active Participle) the natural use of the female. Both verbs indicate a deliberate departure from the natural order. - aschemosunen (G808) = "shamelessness/indecency." - The passage connects homosexual acts to the rejection of God (vv.21-25) -- the theological root is idolatry, the behavioral fruit includes sexual deviation. - This connects to Lev 18:22 (homosexual acts called "abomination") and Lev 18:24-30 (Canaanites judged for these practices). Paul's teaching in Romans follows the same framework as Leviticus: these acts violate a universal moral order, not a culture-specific code.

Romans 7:1-3¶

Context: Paul uses marriage law as an analogy for the believer's relationship to the law. Direct statement: "The woman which hath an husband is bound by the law to her husband so long as he liveth; but if the husband be dead, she is loosed from the law of her husband. So then if, while her husband liveth, she be married to another man, she shall be called an adulteress (moichalis)" (vv.2-3). Key observations: Paul states the marriage bond endures "as long as he liveth." Death dissolves the bond. A woman who remarries while her husband lives is called moichalis -- an adulteress. This confirms the permanence of the marriage covenant and aligns with Jesus' teaching in Mat 19:6-9.

Romans 13:9,13¶

Direct statement: "Thou shalt not commit adultery (ou moicheuseis), Thou shalt not kill, Thou shalt not steal, Thou shalt not bear false witness, Thou shalt not covet; and if there be any other commandment, it is briefly comprehended in this saying, namely, Thou shalt love thy neighbour as thyself" (v.9). "Not in chambering (koite) and wantonness" (v.13). Key observations: Paul lists the seventh commandment first among five Decalogue commands that love fulfills. Already registered as E031. In v.13, koite (G2845) is used negatively for illicit sexual activity -- "chambering." The same word is used positively in Heb 13:4 for the marriage bed.

1 Corinthians 5:1-5,9-11¶

Context: Paul addresses a case of incest in the Corinthian church. Direct statement: "There is fornication (porneia) among you, and such fornication as is not so much as named among the Gentiles, that one should have his father's wife" (v.1). Paul commands excommunication: "deliver such an one unto Satan" (v.5). He instructs: "not to keep company, if any man that is called a brother be a fornicator (pornos)" (v.11). Key observations: The case involves a man having his father's wife -- a violation of Lev 18:8. Paul does not merely cite Jewish law; he says this is "not so much as named among the Gentiles" -- a universal moral standard. Church discipline (excommunication) is prescribed for unrepentant sexual sin.

1 Corinthians 6:9-20¶

Context: Paul addresses the body, sexual immorality, and the temple of the Holy Spirit. Direct statement: "Neither fornicators (pornoi), nor idolaters, nor adulterers (moichoi), nor effeminate (malakoi), nor abusers of themselves with mankind (arsenokoitai), ...shall inherit the kingdom of God" (vv.9-10). "And such were some of you: but ye are washed, but ye are sanctified" (v.11). "The body is not for fornication (porneia), but for the Lord" (v.13). "Know ye not that your bodies are the members of Christ? shall I then take the members of Christ, and make them the members of an harlot?" (v.15). "He which is joined to an harlot is one body? for two, saith he, shall be one flesh" (v.16 -- quoting Gen 2:24). "Flee fornication (porneia)...he that committeth fornication sinneth against his own body" (v.18). "Your body is the temple (naos) of the Holy Ghost which is in you, which ye have of God, and ye are not your own" (v.19). "Ye are bought with a price: therefore glorify God in your body" (v.20). Key observations: - Paul distinguishes pornoi (fornicators, broader) from moichoi (adulterers, specific). Both are excluded from the kingdom. - Arsenokoitai (G733) = "abusers of themselves with mankind" -- a compound of arsen ("male") + koite ("bed"), echoing the LXX language of Lev 18:22 and 20:13. - Paul quotes Gen 2:24 ("two shall be one flesh") in v.16 to argue that sexual union with a prostitute creates a "one flesh" bond that violates the believer's union with Christ. - Greek parsing of v.18: pheugete (Present Active Imperative 2P, "Keep fleeing!") -- an ongoing command, not a one-time action. Porneuon (Present Active Participle, "the one who commits fornication") -- the one who practices fornication "sins against his own body." - Naos (G3485, v.19) = "inner sanctuary/temple" (not hieron, the temple complex). The body is the holy of holies where the Spirit dwells. - "Ye are not your own" (v.19) and "ye are bought with a price" (v.20) -- the theological basis for sexual purity is divine ownership through redemption. - Verse 11 ("such were some of you") indicates that repentance and transformation from sexual sin are possible through grace.

1 Corinthians 7:1-16¶

Context: Paul responds to the Corinthians' questions about marriage and celibacy. Direct statement: "To avoid fornication (porneia), let every man have his own wife, and let every woman have her own husband" (v.2). Mutual conjugal duty: "Let the husband render unto the wife due benevolence: and likewise also the wife unto the husband" (v.3). "The wife hath not power of her own body, but the husband: and likewise also the husband hath not power of his own body, but the wife" (v.4). "Defraud ye not one the other" (v.5). To the married: "Let not the wife depart from her husband...and let not the husband put away his wife" (vv.10-11). For mixed marriages: "If any brother hath a wife that believeth not, and she be pleased to dwell with him, let him not put her away" (v.12). "If the unbelieving depart, let him depart. A brother or a sister is not under bondage in such cases" (v.15). Key observations: Marriage is presented as the proper remedy against porneia (v.2). Mutual authority over the body (v.4) reflects the "one flesh" principle. Paul commands no divorce (vv.10-11), with a provision for separation without remarriage. The "not under bondage" clause (v.15) in the case of abandonment by an unbeliever has been debated regarding whether it allows remarriage.

1 Corinthians 10:8¶

Direct statement: "Neither let us commit fornication (porneuo), as some of them committed, and fell in one day three and twenty thousand." Key observations: Paul references the incident at Baal-peor (Num 25:1-9), where Israel's sexual sin with Moabite women resulted in mass death. This historical precedent serves as a warning to the Corinthian church.

2 Corinthians 12:21¶

Direct statement: Paul fears he will "bewail many which have sinned already, and have not repented of the uncleanness and fornication and lasciviousness which they have committed." Key observations: Three terms in ascending scope: akatharsia ("uncleanness"), porneia ("fornication"), and aselgeia ("lasciviousness/licentiousness"). The requirement is repentance.

Galatians 5:19-21¶

Direct statement: "The works of the flesh are manifest, which are these; Adultery (moicheia), fornication (porneia), uncleanness (akatharsia), lasciviousness (aselgeia)...they which do such things shall not inherit the kingdom of God." Key observations: Both moicheia and porneia appear in the same list as distinct terms. Those who practice these things "shall not inherit the kingdom of God" -- eschatological exclusion, paralleling 1 Cor 6:9-10, Rev 21:8, and Rev 22:15.

Ephesians 4:17-19¶

Direct statement: Gentiles "have given themselves over unto lasciviousness (aselgeia), to work all uncleanness (akatharsia) with greediness." Key observations: Paul contrasts the Gentile lifestyle with the calling of believers -- the same framework as Lev 18:3 ("after the doings of the land of Egypt...shall ye not do").

Ephesians 5:3-6¶

Direct statement: "Fornication (porneia), and all uncleanness, or covetousness, let it not be once named among you" (v.3). "No whoremonger (pornos), nor unclean person...hath any inheritance in the kingdom of Christ and of God" (v.5). "Because of these things cometh the wrath of God upon the children of disobedience" (v.6). Key observations: Pornos (G4205, "whoremonger/fornicator") is excluded from the kingdom. The "wrath of God" comes upon those who practice these things -- paralleling Lev 18:24-30 (Canaanite judgment) and Rev 21:8.

Colossians 3:5¶

Direct statement: "Mortify therefore your members which are upon the earth; fornication (porneia), uncleanness, inordinate affection, evil concupiscence, and covetousness, which is idolatry." Key observations: Porneia heads the list of things to "mortify" (put to death). Covetousness is equated with idolatry -- connecting the tenth commandment to the first, and paralleling how sexual immorality (seventh commandment violation) is linked to idolatry in the prophets.

1 Thessalonians 4:3-7¶

Direct statement: "This is the will of God, even your sanctification, that ye should abstain from fornication (porneia)" (v.3). "That every one of you should know how to possess his vessel in sanctification and honour; Not in the lust of concupiscence, even as the Gentiles which know not God" (vv.4-5). "God hath not called us unto uncleanness, but unto holiness" (v.7). Key observations: Abstaining from porneia is identified as "the will of God." The contrast is again between believers and Gentiles who "know not God" -- paralleling Lev 18:3 and Eph 4:17-19. God's calling is to holiness, which includes sexual purity.

1 Timothy 1:9-10¶

Direct statement: The law is "for whoremongers (pornoi), for them that defile themselves with mankind (arsenokoitai)." Key observations: Paul lists pornoi and arsenokoitai among those for whom the law was given. Arsenokoitai appears again (cf. 1 Cor 6:9), consistently referring to homosexual acts. The law -- including the seventh commandment -- continues to function as a moral standard. Already partially reflected in E392.

J. Other NT Witnesses¶

Hebrews 13:4¶

Context: Pastoral exhortations in the final chapter of Hebrews. Direct statement: "Marriage is honourable in all, and the bed (koite) undefiled: but whoremongers (pornous) and adulterers (moichous) God will judge." Key observations: - Greek parsing: timios (G5093, "honorable/precious") ho gamos (G1062, "the marriage") en pasin ("in all"). He koite (G2845, "the bed") amiantos (G283, "undefiled"). Pornous (G4205, acc pl, "whoremongers/fornicators") gar kai moichous (G3432, acc pl, "adulterers") krinei (G2919, Future Active Ind 3S, "will judge") ho theos ("God"). - Two-part structure: (1) positive affirmation -- marriage and its sexual expression are honorable and undefiled; (2) negative warning -- God will judge pornous and moichous. - Both pornous (broader sexual sin) and moichous (adultery specifically) are named under divine judgment. - Krinei (Future Active Indicative) -- "God WILL judge" -- the certainty of future judgment. - The marriage bed (koite) is "undefiled" (amiantos) when within God's design. Outside marriage, the same act becomes porneia or moicheia.

James 2:11¶

Direct statement: "For he that said, Do not commit adultery, said also, Do not kill. Now if thou commit no adultery, yet if thou kill, thou art become a transgressor of the law." Key observations: James pairs the seventh commandment with the sixth as examples demonstrating the unity of the law. Violating one commandment makes a person a "transgressor of the law" as a whole. Already registered as E393. James identifies the same divine Speaker ("he that said") behind both commandments -- the Decalogue's divine origin.

1 Peter 4:3¶

Direct statement: "The time past of our life may suffice us to have wrought the will of the Gentiles, when we walked in lasciviousness (aselgeia), lusts (epithumia)..." Key observations: Peter lists sexual sin as part of the former Gentile lifestyle that believers have left behind. The past-tense language ("the time past...may suffice") indicates that conversion involves a break from sexual immorality.

2 Peter 2:9-10,14¶

Direct statement: "The Lord knoweth how to...reserve the unjust unto the day of judgment to be punished: But chiefly them that walk after the flesh in the lust of uncleanness" (vv.9-10). "Having eyes full of adultery (moichalis), and that cannot cease from sin" (v.14). Key observations: Those who "walk after the flesh in the lust of uncleanness" are singled out for judgment. "Eyes full of adultery" recalls Jesus' teaching that lustful looking constitutes adultery (Mat 5:28).

Jude 1:7¶

Direct statement: "Even as Sodom and Gomorrha, and the cities about them in like manner, giving themselves over to fornication (ekporneuo), and going after strange flesh, are set forth for an example, suffering the vengeance of eternal fire." Key observations: Ekporneuo (G1608) is the intensified form of porneuo -- "to give oneself over to fornication utterly." "Going after strange flesh" (sarkos heteras) describes the homosexual acts of Gen 19:5-8. Sodom and Gomorrah serve as "an example" (deigma) of divine judgment on sexual sin. "Eternal fire" connects to the eschatological exclusion in Rev 21:8.

K. Eschatological Exclusion¶

Revelation 2:20-22¶

Context: The message to the church at Thyatira. Direct statement: "Thou sufferest that woman Jezebel...to teach and to seduce my servants to commit fornication" (v.20). "I gave her space to repent of her fornication; and she repented not" (v.21). "I will cast her into a bed, and them that commit adultery with her into great tribulation, except they repent" (v.22). Key observations: The risen Christ identifies sexual immorality as a matter requiring repentance. Opportunity to repent is given. Judgment follows unrepentance. Both porneia ("fornication") and moicheia ("adultery") appear. The pattern: sin --> offer of repentance --> judgment on the unrepentant.

Revelation 9:21¶

Direct statement: "Neither repented they of their murders, nor of their sorceries, nor of their fornication (porneia), nor of their thefts." Key observations: Fornication appears in an end-time list of sins from which humanity refuses to repent, alongside murders, sorceries, and thefts -- echoing the Decalogue categories.

Revelation 21:8¶

Direct statement: "The fearful, and unbelieving, and the abominable, and murderers, and whoremongers (pornoi), and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death." Key observations: Pornoi ("whoremongers/fornicators") are excluded from the new creation and consigned to the "lake of fire." This is the eschatological consequence of unrepentant sexual sin. The list echoes Decalogue categories: murder (6th), sexual immorality (7th), false witness/lying (9th), idolatry (1st/2nd).

Revelation 22:15¶

Direct statement: "For without are dogs, and sorcerers, and whoremongers (pornoi), and murderers, and idolaters, and whosoever loveth and maketh a lie." Key observations: Pornoi are permanently excluded from the New Jerusalem. "Without" means outside the city of God. This is the final word on the eschatological status of unrepentant sexual sin in the biblical canon.

Patterns Identified¶

Creation-to-Revelation arc: The sexual ethic begins at creation (Gen 2:24 -- "one flesh"), is formalized at Sinai (Exo 20:14), expanded in the Mosaic legislation (Lev 18), deepened by Jesus (Mat 5:27-28), applied by Paul (1 Cor 6:18-20; Rom 1:26-27), and brought to eschatological conclusion (Rev 21:8; 22:15). No biblical author departs from this trajectory.
Pre-Sinai universality: The seventh commandment's moral content existed before Sinai. Non-Israelites recognized adultery as sinful (Gen 20:3-7; 26:10-11). God held the Canaanites accountable for the same sexual violations addressed in Leviticus 18 (Lev 18:24-30). The commandment formalizes a pre-existing moral standard.
Narrow commandment, broad application: The commandment uses the narrow term naaph/moicheuo (adultery proper), but its application extends to all forms of sexual immorality (porneia). Leviticus 18 expands the scope to 12+ categories. Paul commands flight from all porneia (1 Cor 6:18). Hebrews 13:4 names both pornoi and moichoi under judgment. The narrow prohibition implies the broad standard.
Internal dimension: The commandment addresses not only outward action but inward disposition. Proverbs 6:25 ("Lust not after her beauty in thine heart") anticipates Jesus' explicit teaching (Mat 5:28). The heart is the origin of both adulteries and fornications (Mat 15:19).
Marriage as covenant: Malachi calls marriage a "covenant" (berith, Mal 2:14) and uses bagad ("treachery") for its violation. Jesus calls marriage a divine joining: "What God hath joined together, let not man put asunder" (Mat 19:6). Paul describes the marriage bond as lasting "as long as he liveth" (Rom 7:2).
Body-as-temple theology: Paul grounds the sexual ethic in the believer's body being the temple of the Holy Spirit (1 Cor 6:19). Sexual sin is unique in that it "sinneth against his own body" (1 Cor 6:18). The body belongs to God through redemption (1 Cor 6:20).
Eschatological exclusion: The sexually immoral are excluded from the kingdom of God (1 Cor 6:9-10; Gal 5:19-21; Eph 5:5; Rev 21:8; 22:15). This is consistent across Paul, the author of Hebrews (13:4), and John in Revelation.
Prophetic metaphor: Adultery/whoredom serves as the primary metaphor for spiritual unfaithfulness to God (Jer 3:1-14; Ezk 16; Hos 1-3; Rev 17). God is repeatedly described as Israel's "husband" (Jer 3:14; Hos 2:19-20). This figurative usage presupposes and reinforces the literal prohibition.
Repentance and restoration: Despite the gravity of adultery, repentance is possible. "Such were some of you: but ye are washed" (1 Cor 6:11). Jesus tells the adulterous woman: "Neither do I condemn thee: go, and sin no more" (Jhn 8:11). Rev 2:21-22 offers "space to repent."

Connections Between Passages¶

Genesis 2:24 as the baseline: Jesus quotes Gen 2:24 in Mat 19:4-6 to establish the creation standard. Paul quotes it in 1 Cor 6:16 to show that sexual union creates a one-flesh bond even with a prostitute, and in Eph 5:31 for the marriage-Christ/church typology. The seventh commandment (Exo 20:14) protects the one-flesh institution that Genesis 2:24 established.

Leviticus 18 and Romans 1: Both passages address sexual sins in the context of rejection of God. Lev 18:3 contrasts Israel with Egypt and Canaan. Rom 1:21-27 traces the progression from rejecting God to idolatry to sexual perversion. Both passages treat homosexual acts as departures from a universal standard (Lev 18:22 -- "abomination"; Rom 1:26 -- "against nature"). Both indicate that non-Israelites are held accountable (Lev 18:24-30 -- Canaanites judged; Rom 1:18-32 -- Gentile world under judgment).

Matthew 5:27-28 and Proverbs 6:25: Jesus' extension of the commandment to lustful intent was anticipated in Proverbs. Both address the heart. Both identify desire as the root of the external act.

Hebrews 13:4 and Revelation 21:8; 22:15: Heb 13:4 states "whoremongers and adulterers God will judge." Rev 21:8 describes the judgment: "the lake which burneth with fire and brimstone." Rev 22:15 states the permanent exclusion: "without are...whoremongers." The progression: affirmation of marriage --> warning of judgment --> description of judgment --> eternal exclusion.

1 Corinthians 6:16 and Genesis 2:24: Paul's quotation of Gen 2:24 in the context of sexual sin with a prostitute demonstrates that the "one flesh" principle operates even in illicit unions. This is why sexual sin is uniquely destructive -- it creates a counterfeit one-flesh bond that violates the creation design.

Word Study Insights¶

Naaph (H5003) vs. zanah (H2181): The seventh commandment uses the narrow term naaph (adultery -- violation of the marriage covenant). The broader zanah (fornication/harlotry) covers all forms of sexual immorality. The OT uses both: naaph for the specific prohibition, zanah for the broader category. The same distinction is preserved in Greek: moicheuo (G3431) = naaph; porneia (G4202) = zanah.

Epithumeo (G1937): Not inherently negative (cf. Luk 22:15; 1 Tim 3:1). In Mat 5:28, the purpose clause (pros to epithumesai) specifies the sinful intent. Context determines whether the desire is legitimate or sinful.

Porneia (G4202): Broader than moicheia. Its definition includes "harlotry (including adultery and incest)." In Mat 19:9, Jesus uses porneia (not moicheia) for the exception clause, which may indicate a broader ground than adultery alone.

Arsenokoitai (G733): Compound of arsen + koite, echoing the LXX of Lev 18:22 and 20:13. Used in 1 Cor 6:9 and 1 Tim 1:10 for homosexual acts. The word's formation directly links the NT prohibition to the Levitical legislation.

Bagad (H898): "Deal treacherously" -- used in Mal 2:14-16 for divorce. This vocabulary frames marital unfaithfulness as covenant betrayal, not merely a personal offense.

Koite (G2845): "Bed/cohabitation." Positive in Heb 13:4 ("bed undefiled"); negative in Rom 13:13 ("chambering"). The same word describes both the legitimate and the illegitimate, with the moral distinction determined by context (within or outside marriage).

Difficult Passages¶

Matthew 19:9 Exception Clause¶

The phrase "except it be for porneia" (me epi porneia) has generated extensive debate. The text states that divorce and remarriage constitute adultery UNLESS the ground is porneia. The text uses porneia (not moicheia), raising the question of what falls within the exception. Porneia's semantic range includes adultery, pre-marital sexual sin, incest, and prostitution. The text does not specify which meaning applies in this context. Mark 10:11-12 and Luke 16:18 record the teaching without the exception clause. The text states what it states: there is an exception clause in Matthew's Gospel; the other Synoptics do not include it.

1 Corinthians 7:15 -- "Not Under Bondage"¶

Paul states that if an unbelieving spouse departs, the believer is "not under bondage in such cases." The text does not specify whether "not under bondage" means freedom to remarry or merely freedom from the obligation to maintain the marriage. This is a genuine textual ambiguity.

John 8:1-11 -- Textual Status¶

The Pericope Adulterae (Jhn 7:53-8:11) is absent from many early manuscripts. Its textual status is debated. However, the passage's teaching is consistent with the broader biblical pattern: adultery is sin, but repentance is possible.

Romans 1:26-27 -- Scope¶

The text describes homosexual acts as "against nature" (para phusin) and as a consequence of rejecting God. The passage addresses the acts themselves, using language of deliberate exchange and abandonment of the natural function. The text does not address the question of orientation as a modern category; it addresses the acts as described.

Analysis completed: 2026-02-27 Series: Ten Commandments Deep Dive (cmd-08)