Quotation with a quotation formula (γέγραπται). MT
כִּי־לִי תִּכְרַע כָּל־בֶּרֶךְ תִּשָּׁבַע כָּל־לָשׁוֹן ("Every knee will bow before Me, every tongue will swear allegiance," BSB); Swete ὅτι ἐμοὶ κάμψει πᾶν γόνυ, καὶ ὀμεῖται πᾶσα γλῶσσα τὸν θεόν, where A and Q (and a corrector of ℵ) read ἐξομολογήσεται and τῷ θεῷ, as Paul does. The opening Ζῶ ἐγώ, λέγει κύριος is not in Isa 45:23; Swete's Isa 49:18 has ζῶ ἐγώ, λέγει Κύριος. A form comparison only. See
note.language.Rom.14.11.isa-45-23.heb. LXX read on the Swete page image, vol. 3 (1912), pp. 187, 194.