Deut 32:35–36 in the LXX: ἐν ἡμέρᾳ ἐκδικήσεως ἀνταποδώσω … κρινεῖ Κύριος

Says Swete prints ἐν ἡμέρᾳ ἐκδικήσεως ἀνταποδώσω, ὅταν σφαλῇ ὁ ποὺς αὐτῶν (en hēmera ekdikēseōs antapodōsō, "in the day of vengeance I will repay, when their foot slips"; vol. 1, p. 413). The Hebrew has לִי נָקָם וְשִׁלֵּם (li naqam veshillem, "vengeance and recompense are mine"), with וְשִׁלֵּם parsed as a noun in the Hebrew note.

Says So the Greek has "in the day of vengeance" where the Hebrew has "mine," and a verb, "I will repay," where the Hebrew has a noun.

Uncertain Whether the Greek reflects a different Hebrew text or the translator's reading of this one; no lean, since nothing in the frozen inputs settles it. The textual decision is var.Deut.32.35.mine-vengeance.

Says 32:36 reads ὅτι κρινεῖ Κύριος τὸν λαὸν αὐτοῦ, καὶ ἐπὶ τοῖς δούλοις αὐτοῦ παρακληθήσεται (p. 413), word for word with כִּי־יָדִין יְהוָה עַמּוֹ וְעַל־עֲבָדָיו יִתְנֶחָם. κρινεῖ (krinei, "will judge") renders יָדִין (yadin); whether it means "vindicate" or "judge" belongs to the Hebrew notes.

For Rom 12:19 and Heb 10:30 see the cross-reference notes.