Rev 22:10 → Dan 12:4 (ot, antithetical: Daniel told to seal; John told NOT to seal; same concept, opposite command)
Rev 10:3 → John 12:28-29 (nt, conceptual inverse: in John 12, divine voice mistaken for thunder; in Rev 10, thunder IS divine speech)
Rev 1:4 → Rom 1:7 (nt, structural: greeting formula comparison; Rom biadic (Father + Lord), Rev triadic (Father + Spirits + Christ))
Rev 11:4 → Zech 4:3 (ot, allusion: two olive trees and lampstands; Zechariah source for Revelation's two witnesses)
Zech 4:10 → 2 Chr 16:9 (ot, vocabulary: both use 'eyes of the LORD run to and fro throughout the whole earth' — same vocabulary (einei YHWH, meshotetim, bekhol-ha'arets))