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Grammar Analysis: Jeremiah 25:11-12 + 29:10 — The Seventy-Year Babylonian Captivity

Summary

Jeremiah's seventy-year Babylonian captivity prophecy (Jer 25:11-12; 29:10; cf. 2 Chr 36:21; Dan 9:2) is a CONTROL CASE for the day-for-year question. It is a prophetic time-prediction that is NOT day-for-year. The grammar, genre, and reception history all converge on literal years.

Four reinforcing signals: 1. Plain šānāh — the word "year" appears four times across these verses as a straight accusative-of-duration with the numeral šiḇʿîm ("seventy"). There is no yôm laššānāh ("a day for a year") declaration anywhere in the context. 2. No apocalyptic genre markers — no vision, no symbolic beast, no angelic interpreter, no numbered period riding on a symbolic time-unit. 3. No seal-command — contrast Dan 8:26; 12:4, 9 where the text flags its own temporal opacity. 4. Daniel reads it literally (Dan 9:2) — while exiled in Babylon Daniel computes mispar ha-šānîm ("the number of the years") from Jeremiah's scrolls as the actual years Jerusalem would lie desolate, and prays at the terminal end of that period. His reading is canonically authoritative for how the prophecy was meant to function.

The 70 years are fulfilled within one lifetime at the literal-year scale: 605 BC (first deportation) → 539 BC (Cyrus decree) ≈ 66-70 years depending on reckoning; or 586 BC (temple destruction) → 516 BC (temple rebuilt) = 70 years exactly. Either terminus works at literal scale; no year-day expansion is required or grammatically invited.

This entry supplies the hermeneutic baseline: day-for-year is genre-triggered, not universally applied to every prophetic time-reference. The very prophet (Ezekiel) who declared the yôm laššānāh rule at Ezek 4:6 uses plain šānāh literally at Ezek 29:11-13 for Egypt's forty-year desolation. Jeremiah's seventy years operate the same way: ordinary calendrical speech in a non-apocalyptic oracle.

Texts

Jeremiah 25:11

Hebrew: וְהָֽיְתָה֙ כָּל־הָאָ֣רֶץ הַזֹּ֔את לְחָרְבָּ֖ה לְשַׁמָּ֑ה וְעָ֨בְד֜וּ הַגֹּויִ֥ם הָאֵ֛לֶּה אֶת־מֶ֥לֶךְ בָּבֶ֖ל שִׁבְעִ֥ים שָׁנָֽה׃

Transliteration: wə-hāyəṯāh kol-hā-ʾāreṣ haz-zōʾṯ lə-ḥorbāh lə-šammāh, wə-ʿāḇəḏû hag-gôyim hā-ʾēlleh ʾeṯ-meleḵ Bāḇel šiḇʿîm šānāh

KJV: And this whole land shall be a desolation, [and] an astonishment; and these nations shall serve the king of Babylon seventy years.

Jeremiah 25:12

Hebrew: וְהָיָ֣ה כִמְלֹ֣אות שִׁבְעִ֣ים שָׁנָ֡ה אֶפְקֹ֣ד עַל־מֶֽלֶךְ־בָּבֶל֩ וְעַל־הַגֹּ֨וי הַה֧וּא נְאֻם־יְהוָ֛ה אֶת־עֲוֹנָ֖ם וְעַל־אֶ֣רֶץ כַּשְׂדִּ֑ים וְשַׂמְתִּ֥י אֹתֹ֖ו לְשִֽׁמְמֹ֥ות עֹולָֽם׃

Transliteration: wə-hāyāh ḵi-məlōʾṯ šiḇʿîm šānāh ʾep̄qōḏ ʿal-meleḵ-Bāḇel wə-ʿal-hag-gôy ha-hûʾ nəʾum-YHWH ʾeṯ-ʿăwōnām wə-ʿal-ʾereṣ Kaśdîm wə-śamtî ʾōṯô lə-šiməmôṯ ʿôlām

KJV: And it shall come to pass, when seventy years are accomplished, [that] I will punish the king of Babylon, and that nation, saith the LORD, for their iniquity, and the land of the Chaldeans, and will make it perpetual desolations.

Jeremiah 29:10

Hebrew: כִּֽי־כֹה֙ אָמַ֣ר יְהוָ֔ה כִּ֠י לְפִ֞י מְלֹ֧את לְבָבֶ֛ל שִׁבְעִ֥ים שָׁנָ֖ה אֶפְקֹ֣ד אֶתְכֶ֑ם וַהֲקִמֹתִ֤י עֲלֵיכֶם֙ אֶת־דְּבָרִ֣י הַטֹּ֔וב לְהָשִׁ֣יב אֶתְכֶ֔ם אֶל־הַמָּקֹ֖ום הַזֶּֽה׃

Transliteration: kî-ḵōh ʾāmar YHWH kî lə-p̄î məlōʾṯ lə-Bāḇel šiḇʿîm šānāh ʾep̄qōḏ ʾeṯḵem wa-hăqîmōṯî ʿălêḵem ʾeṯ-dəḇārî haṭ-ṭôḇ lə-hāšîḇ ʾeṯḵem ʾel-ham-māqôm haz-zeh

KJV: For thus saith the LORD, That after seventy years be accomplished at Babylon I will visit you, and perform my good word toward you, in causing you to return to this place.

2 Chronicles 36:21 (fulfillment/commentary)

Hebrew: לְמַלֹּ֤אות דְּבַר־יְהוָה֙ בְּפִ֣י יִרְמְיָ֔הוּ עַד־רָצְתָ֥ה הָאָ֖רֶץ אֶת־שַׁבְּתֹותֶ֑יהָ כָּל־יְמֵ֤י הָשַּׁמָּה֙ שָׁבָ֔תָה לְמַלֹּ֖אות שִׁבְעִ֥ים שָׁנָֽה׃

Transliteration: lə-mallōʾṯ dəḇar-YHWH bə-p̄î Yirməyāhû ʿaḏ-rāṣəṯāh hā-ʾāreṣ ʾeṯ-šabbəṯôṯêhā, kol-yəmê ha-šammāh šāḇāṯāh lə-mallōʾṯ šiḇʿîm šānāh

KJV: To fulfil the word of the LORD by the mouth of Jeremiah, until the land had enjoyed her sabbaths: [for] as long as she lay desolate she kept sabbath, to fulfil threescore and ten years.

Word-by-Word Parsing

Jeremiah 25:11

# Hebrew Lemma Parsing Gloss
1 וְ ו Conj and
2 הָֽיְתָה֙ היה Verb.Qal.Perf.3fs shall be
3 כָּל כל Noun.ms.Cst whole
4 הָ + אָ֣רֶץ ה + ארץ Art + Noun.s.Abs the land
5 הַ + זֹּ֔את ה + זאת Art + DemPron.fs this
6 לְ + חָרְבָּ֖ה ל + חרבה Prep + Noun.fs.Abs for a ruin
7 לְ + שַׁמָּ֑ה ל + שׁמה Prep + Noun.fs.Abs for a horror
8 וְ ו Conj and
9 עָ֨בְד֜וּ עבד Verb.Qal.Perf.3p shall serve
10 הַ + גֹּויִ֥ם ה + גוי Art + Noun.mp.Abs the nations
11 הָ + אֵ֛לֶּה ה + אלה Art + DemPron.p these
12 אֶת את Prep (obj-marker) —
13 מֶ֥לֶךְ מלך Noun.ms.Cst king of
14 בָּבֶ֖ל בבל PropN.s.Abs Babylon
15 שִׁבְעִ֥ים שׁבע Noun.mp.Abs seventy
16 שָׁנָֽה שׁנה Noun.fs.Abs year

Jeremiah 25:12

# Hebrew Lemma Parsing Gloss
1 וְ + הָיָ֣ה ו + היה Conj + Verb.Qal.Perf.3ms and it shall come to pass
2 כִ כ Prep as / when
3 מְלֹ֣אות מלא Verb.Qal.InfCon.Cst the fulfilling of
4 שִׁבְעִ֣ים שׁבע Noun.mp.Abs seventy
5 שָׁנָ֡ה שׁנה Noun.fs.Abs year
6 אֶפְקֹ֣ד פקד Verb.Qal.Impf.1s I will punish / visit
7 עַל על Prep upon
8 מֶֽלֶךְ מלך Noun.ms.Cst king of
9 בָּבֶל֩ בבל PropN.s.Abs Babylon
10 וְ + עַל ו + על Conj + Prep and upon
11 הַ + גֹּ֨וי ה + גוי Art + Noun.ms.Abs the nation
12 הַ + ה֧וּא ה + הוא Art + PersPron.3ms that
13 נְאֻם נאם Noun.ms.Cst oracle of
14 יְהוָ֛ה יהוה PropN.ms.Abs YHWH
15 אֶת את Prep (obj-marker) —
16 עֲוֹנָ֖ם עון Noun.ms.Abs + 3mp suff their iniquity
17 וְ + עַל ו + על Conj + Prep and upon
18 אֶ֣רֶץ ארץ Noun.s.Cst land of
19 כַּשְׂדִּ֑ים כשׂדי Adj.mp.Abs Chaldeans
20 וְ + שַׂמְתִּ֥י ו + שׂים Conj + Verb.Qal.Perf.1s and I will make
21 אֹתֹ֖ו את Prep + 3ms it
22 לְ + שִֽׁמְמֹ֥ות ל + שׁממה Prep + Noun.fp.Cst for desolations of
23 עֹולָֽם עולם Noun.ms.Abs eternity / everlasting

Jeremiah 29:10

# Hebrew Lemma Parsing Gloss
1 כִּֽי כי Conj for
2 כֹה֙ כה Adv thus
3 אָמַ֣ר אמר Verb.Qal.Perf.3ms says
4 יְהוָ֔ה יהוה PropN.ms.Abs YHWH
5 כִּ֠י כי Conj that / when
6 לְ + פִ֞י ל + פה Prep + Noun.ms.Cst according to the mouth of
7 מְלֹ֧את מלא Verb.Qal.InfCon.Abs fulfilling of
8 לְ + בָבֶ֛ל ל + בבל Prep + PropN for Babylon
9 שִׁבְעִ֥ים שׁבע Noun.mp.Abs seventy
10 שָׁנָ֖ה שׁנה Noun.fs.Abs year
11 אֶפְקֹ֣ד פקד Verb.Qal.Impf.1s I will visit
12 אֶתְכֶ֑ם את Prep + 2mp you
13 וַ + הֲקִמֹתִ֤י ו + קום Conj + Verb.Hiphil.Perf.1s and I will establish
14 עֲלֵיכֶם֙ על Prep + 2mp upon you
15 אֶת + דְּבָרִ֣י את + דבר obj + Noun.ms + 1cs my word
16 הַ + טֹּ֔וב ה + טוב Art + Adj.ms.Abs the good
17 לְ + הָשִׁ֣יב ל + שׁוב Prep + Verb.Hiphil.InfCon to cause to return
18 אֶתְכֶ֔ם את Prep + 2mp you
19 אֶל + הַ + מָּקֹ֖ום אל + ה + מקום Prep + Art + Noun to the place
20 הַ + זֶּֽה ה + זה Art + DemPron.ms this

2 Chronicles 36:21

# Hebrew Lemma Parsing Gloss
1 לְ + מַלֹּ֤אות ל + מלא Prep + Verb.Piel.InfCon.Cst to fulfill
2 דְּבַר דבר Noun.ms.Cst word of
3 יְהוָה֙ יהוה PropN.ms.Abs YHWH
4 בְּ + פִ֣י ב + פה Prep + Noun.ms.Cst by the mouth of
5 יִרְמְיָ֔הוּ ירמיהו PropN.ms.Abs Jeremiah
6 עַד עד Prep until
7 רָצְתָ֥ה רצה Verb.Qal.Perf.3fs had paid off / enjoyed
8 הָ + אָ֖רֶץ ה + ארץ Art + Noun.s.Abs the land
9 אֶת את Prep (obj-marker) —
10 שַׁבְּתֹותֶ֑יהָ שׁבת Noun.fp.Abs + 3fs her sabbaths
11 כָּל כל Noun.ms.Cst all of
12 יְמֵ֤י יום Noun.mp.Cst the days of
13 הָ + שַּׁמָּה֙ ה + שׁמה Art + Noun.fs.Abs the desolation
14 שָׁבָ֔תָה שׁבת Verb.Qal.Perf.3fs she kept sabbath
15 לְ + מַלֹּ֖אות ל + מלא Prep + Verb.Piel.InfCon.Cst to fulfill
16 שִׁבְעִ֥ים שׁבע Noun.mp.Abs seventy
17 שָׁנָֽה שׁנה Noun.fs.Abs year

Clause Structure

Jeremiah 25:11 — two coordinated weqatal clauses

  • Clause 1 (WQtX, quotation domain): wə-hāyəṯāh kol-hā-ʾāreṣ haz-zōʾṯ lə-ḥorbāh lə-šammāh
  • Pred: hāyəṯāh | Subj: kol hā-ʾāreṣ haz-zōʾṯ | PreC: lə-ḥorbāh lə-šammāh
  • Clause 2 (WQtX, quotation domain): wə-ʿāḇəḏû hag-gôyim hā-ʾēlleh ʾeṯ-meleḵ Bāḇel šiḇʿîm šānāh
  • Pred: ʿāḇəḏû | Subj: hag-gôyim hā-ʾēlleh | Objc: ʾeṯ-meleḵ Bāḇel | Time: šiḇʿîm šānāh

The BHSA parser classifies šiḇʿîm šānāh explicitly as a Time adjunct of the predicate ʿāḇəḏû ("they shall serve"). Grammatically this is an accusative of temporal duration — the ordinary way Hebrew says "for X years." There is no trace of sign-act framing, no interpretive formula, no symbolic substitution. It is the same construction used of Jacob serving Laban "seven years" (Gen 29:20, 30), Israel's forty-year wilderness (Num 14:33-34 non-sign-act uses), etc.

Jeremiah 25:12 — apodosis with infinitive-construct temporal clause

  • Clause 1: wə-hāyāh — formulaic "and it shall come to pass"
  • Clause 2 (InfC): ḵi-məlōʾṯ šiḇʿîm šānāh — "when seventy years are fulfilled"
  • Pred: məlōʾṯ (Qal infinitive construct of מלא) | Subj: šiḇʿîm šānāh
  • Clause 3 (ZYq0): ʾep̄qōḏ ʿal-meleḵ Bāḇel… — "I will punish the king of Babylon…"

The kə + infinitive construct construction (ḵi-məlōʾṯ) is a standard Hebrew temporal clause: "at the fulfilling of…" / "when X is completed." The subject of the infinitive is šiḇʿîm šānāh — the seventy years themselves are what becomes "full" (מלא). This is the same verb used in 2 Chr 36:21 and Dan 9:2 to describe the seventy years being completed as literal calendar time.

Jeremiah 29:10 — lə-p̄î + infinitive construct

  • Clause 1 (xQtX): kî ḵōh ʾāmar YHWH — messenger-formula
  • Clause 2 (xYq0): kî lə-p̄î… ʾep̄qōḏ ʾeṯḵem — "for according to… I will visit you"
  • Time: lə-p̄î ("according to the mouth of" / "in accordance with the measure of")
  • Clause 3 (InfC): məlōʾṯ lə-Bāḇel šiḇʿîm šānāh
  • Pred: məlōʾṯ | Cmpl: lə-Bāḇel | Subj: šiḇʿîm šānāh
  • Clause 4 (WQt0): wa-hăqîmōṯî ʿălêḵem ʾeṯ dəḇārî haṭ-ṭôḇ — "and I will establish my good word upon you"
  • Clause 5 (InfC): lə-hāšîḇ ʾeṯḵem ʾel ham-māqôm haz-zeh — "to cause you to return to this place"

The idiom lə-p̄î məlōʾṯ ("according to the mouth of the fulfillment of") is an unusual but unambiguous construction. lə-p̄î is a prepositional idiom meaning "according to the measure of / in proportion to." Combined with məlōʾṯ ("the fulfilling/completing of"), the sense is: when the full measure of seventy years for Babylon has been completed. The emphasis is on quantitative completion — a literal exhausting of the seventy-year period — not on symbolic expansion.

Key Grammatical Features

1. šānāh (Noun.fs.Abs) — plain "year" with numeral

  • Form: Feminine singular absolute noun, Strong's H8141 šānāh.
  • Construction: The Hebrew idiom with round-decade numerals places the counted noun in the singular absolute (šiḇʿîm šānāh literally "seventy year"), standing as an accusative of temporal duration.
  • Significance: This is the ordinary, calendrical word for "year" in its plainest syntactic frame. There is no modifier, no appositional decoder, no yôm ("day") paired in substitution, no genitive relation linking it to a symbolic referent.
  • Contrast with Ezek 4:6: Ezekiel's sign-act declaration uses the explicit formula yôm laššānāh yôm laššānāh ("a day for a year, a day for a year") — a double-stamped interpretive rule that redefines the time-unit. Jeremiah has nothing like this. The absence is the datum.
  • Word study: H8141 shaneh
  • Grammar reference: day-year-formula — documents the explicit formula that would be required to trigger day-for-year and shows it is absent here.

2. məlōʾṯ / mallōʾṯ (infinitive construct of מלא) — "fulfilling / completing"

  • Form: Qal infinitive construct (məlōʾṯ, Jer 25:12; 29:10) and Piel infinitive construct (mallōʾṯ, 2 Chr 36:21; Dan 9:2) of the root מלא ("be full, fill, complete").
  • Function: In all four passages this verb governs šiḇʿîm šānāh — the seventy years are the thing being completed. The semantic field is quantitative exhaustion of a measured period, not symbolic expansion.
  • Jer 25:12: ḵi-məlōʾṯ šiḇʿîm šānāh — "when seventy years are fulfilled"
  • Jer 29:10: lə-p̄î məlōʾṯ lə-Bāḇel šiḇʿîm šānāh — "according to the fulfilling of seventy years for Babylon"
  • 2 Chr 36:21: lə-mallōʾṯ šiḇʿîm šānāh (Piel) — "to fulfill seventy years"
  • Dan 9:2: lə-mallōʾṯ lə-ḥārəḇôṯ Yərûšālāim šiḇʿîm šānāh (Piel) — "to fulfill seventy years for the desolations of Jerusalem"
  • Significance: The verb demands a literal, countable terminus. You cannot "fill up" a symbolic unit — you fill up actual calendar time. The Piel intensifies the completion sense (2 Chr, Dan). This verbal framing is diagnostic: where Daniel uses מלא-Piel with šānāh, he reads the number as arithmetic; where Daniel's own apocalyptic visions give time-numbers (Dan 8:14; 12:7), he is told the vision is sealed (Dan 8:26; 12:9) and receives no similar computational cue.
  • Word study: TR-male-pleroo

3. ʿāḇəḏû (Verb.Qal.Perf.3p) — concrete geopolitical servitude

  • Form: Qal perfect 3rd-common-plural (here functioning as a weqatal future after the opening weqatal chain) from root עבד ("serve, work, labor").
  • Significance: The verb denotes real political-military vassalage — the same root used of slaves, corvée labor, and tribute-paying nations. Its subject is hag-gôyim hā-ʾēlleh ("these nations") and its indirect object is meleḵ Bāḇel ("the king of Babylon"). This is not visionary or symbolic language; it is the vocabulary of imperial subjugation.
  • Significance for the day-year question: The genre is concrete geopolitical prophecy, not apocalyptic vision. Apocalyptic time-units ride on symbolic carriers (a little horn, a ram's horns, a visionary sequence); here the "time" sits on a plain historical verb describing nations paying tribute. There is nothing to symbolically decode.

4. rāṣəṯāh hā-ʾāreṣ ʾeṯ-šabbəṯôṯêhā (2 Chr 36:21) — the sabbatical-rest rationale

  • Form: rāṣəṯāh (Qal perfect 3fs from רצה, "pay off / satisfy / enjoy"); šabbəṯôṯêhā (plural noun "her sabbaths" with 3fs suffix).
  • Construction: The land (feminine subject) "pays off" her sabbaths — meaning the accumulated unobserved sabbatical years (Lev 25; 26:34-35, 43) are now being compensated by an enforced rest. kol-yəmê ha-šammāh šāḇāṯāh lə-mallōʾṯ šiḇʿîm šānāh — "all the days of the desolation she kept sabbath, to fulfill seventy years."
  • Significance: The Chronicler anchors the seventy years in Leviticus 26:34-35 — a land-rest arithmetic. Seventy sabbatical years (one every seven years) corresponds to 490 years of neglected sabbath-years. This is a calendrical, not symbolic, calculation. It is impossible to sustain a day-for-year reading here: you cannot multiply sabbath-year debt by 360 without producing absurdities (25,200 sabbatical years ≈ 176,400 years of pre-exilic occupation).
  • Significance for the day-year question: The Chronicler's inspired commentary fixes the denomination at literal years. Any hermeneutic that would convert Jeremiah's seventy into prophetic-day years (70×360 = 25,200 years) breaks the sabbath-debt rationale that the canon itself supplies.

5. mispar ha-šānîm (Dan 9:2) — Daniel's arithmetic reception

  • Form: Construct chain: mispar (ms.Cst "number-of") + ha-šānîm (fp.Abs "the years"). From the word study H4457 mispar — a quantitative numerical count.
  • Significance: In Dan 9:2 Daniel says he "understood by the books [ba-səp̄ārîm] the number of the years whereof the word of the LORD came to Jeremiah." mispar is the Hebrew word for an enumerated arithmetic count — inventories, census totals, troop musters. Daniel is computing the seventy years as calendar time and prays at its terminus (Dan 9:3-19).
  • Significance for the day-year question: This is the genre-distinction baseline. The same prophet who receives the apocalyptic 2300 "evenings-mornings" (Dan 8:14) — where he cannot understand the vision and is told it is sealed for the distant future (Dan 8:26-27) — here reads Jeremiah's seventy years without any symbolic operation, arithmetically, as literal years. Daniel himself treats the two kinds of prophetic time-reference differently. The canonical reader's distinction is the hermeneutic.
  • Passage reference: dan-9-2-jeremiah-reading

Absence of Day-for-Year Triggers

The day-for-year hermeneutic — where it is grammatically licensed — comes with identifiable textual signatures. None of them appear in Jer 25:11-12 / 29:10:

Signature Present in Num 14:34 / Ezek 4:6 Present in Dan 8:14 / 9:24-27 Present in Jer 25:11-12 / 29:10
Explicit yôm laššānāh declaration Yes (both) No (but sign-act analog via covenantal frame) No
Sign-act performance (prophet as symbol) Yes (Ezek 4) No No
Apocalyptic vision context No (sign-act) Yes No
Seal-command or concealment formula No Yes (Dan 8:26; 12:9) No
Symbolic time-carrier (horn, beast, etc.) No Yes No
Terminus beyond one lifetime No (40 yr) Yes (centuries–millennia) No (one lifetime)
Canonical reader decodes symbolically n/a Yes (Dan 12:9 preserves the seal; cf. later apocalyptic tradition) No — Daniel reads it literally (Dan 9:2)

Jeremiah's seventy years hit zero of the hermeneutic triggers. They are ordinary calendrical time.

Fulfillment at Literal-Year Scale

Two conventional reckonings both land inside a seventy-year window:

Terminus a quo Terminus ad quem Years
605 BC — Nebuchadnezzar's first deportation (Dan 1:1-2) 539 BC — Cyrus captures Babylon / decree (2 Chr 36:22-23; Ezra 1:1) ~66-67
586 BC — destruction of the temple 516 BC — second temple dedicated (Ezra 6:15) ~70
605 BC — first deportation 536 BC — return under Zerubbabel begins ~69-70

Biblical authors themselves cite the prophecy as fulfilled: - 2 Chr 36:21-22 — explicit fulfillment notice at Cyrus's decree - Ezra 1:1 — repeats the citation: "that the word of the LORD by the mouth of Jeremiah might be fulfilled" - Dan 9:2 — Daniel praying at the terminal end of the seventy years - Zech 1:12; 7:5 — the 70-year period referenced as ongoing/just-concluded in real historical time

Every one of these fulfillment notices treats šiḇʿîm šānāh as literal calendar years. No canonical witness converts the number to prophetic-day years.

Cross-References

Grammar library

Passage analyses

  • dan-9-2-jeremiah-reading — Daniel's literal reading of Jeremiah's seventy years (the receiving end of the prophecy)
  • ezk-29-11-13-forty-years — parallel control case: Ezekiel uses plain šānāh literally for Egypt's forty-year desolation after declaring the day-for-year rule at Ezek 4:6
  • ezk-4-4-6 — the explicit yôm laššānāh sign-act (contrast case)
  • dan-8-14, dan-9-24-27, dan-12-7-11-12 — apocalyptic time-periods where the seal-command and vision-genre differ categorically

Word studies

Hermeneutic Takeaway

Day-for-year is genre-triggered, not universally applied. Three cumulative lines of evidence here:

  1. Same-author control. Ezekiel declares the rule (Ezek 4:6) and then writes a plain-year forty-year prophecy (Ezek 29:11-13) using the same word. The author distinguishes.
  2. Canonical-reader control. Daniel — the premier apocalyptic seer in the Tanakh — receives sealed apocalyptic numbers (Dan 8:14; 12:7) and prays literally over a non-apocalyptic seventy (Dan 9:2). The reader distinguishes.
  3. Lexical control. The verb מלא ("fulfill, complete") with šānāh functions arithmetically in Jer 25:12; 29:10; 2 Chr 36:21; Dan 9:2 — the years are counted, not decoded. The grammar itself distinguishes.

Jeremiah's seventy-year prophecy is therefore a clean baseline case: a prophetic time-prediction that is demonstrably NOT day-for-year. It establishes that the Bible does not uniformly symbolize prophetic time-references — and thereby validates the genre-triggered approach by which some prophetic time-numbers (e.g., Dan 8:14; 9:24-27; 12:7) are read at day-for-year scale while others (Jer 25:11-12; 29:10; Ezek 29:11-13) are read at literal scale.

The hermeneutic is supplied by the text, not imposed on it.