LXX Psalm 142:2
1 O Lord, attend to my prayer: hearken to my supplication in thy truth; hear me in thy righteousness. 2 And enter not into judgment with thy servant, for in thy sight shall no man living be justified. 3 For the enemy has persecuted my soul; he has brought my life down to the ground; he has made me to dwell in a dark place, as those that have been long dead.
Galatians 2:16
15 We are Jews by birth and not Gentile sinners, 16 yet we know that no one is justified by the works of the law but by the faithfulness of Jesus Christ. And we have come to believe in Christ Jesus, so that we may be justified by the faithfulness of Christ and not by the works of the law, because by the works of the law no one will be justified. 17 But if while seeking to be justified in Christ we ourselves have also been found to be sinners, is Christ then one who encourages sin? Absolutely not!
Notes and References
"... Paul’s rhetoric seems to indicate an astonished outrage at the way the Galatians have thoroughly misunderstood the gospel (esp. Gal 1:6–9; 3:1–5; 4:9–11) they once received so readily (Gal 4:15–20; 5:7). Whoever Paul expected to know this justification tradition, Paul combined the tradition with Jewish Scripture. Paul substantiates his argument with allusion to the Jewish Scriptures, authoritative texts for all relevant parties (Peter, the Galatians, and the opponents). An allusion to LXX Ps 142:2 is widely recognized in Gal 2:16 but rarely is any significance attributed to Paul’s replacement of the Psalm’s phrase “everyone living [πᾶς ζῶν/יח־לכ]” with Paul’s phrase “all flesh [πᾶσα σάρξ].”20 Some doubt that “all flesh” is anything more than a different Vorlage, or simply a stronger expression for human frailty.21 Martyn suggests that Paul’s turn of phrase is motivated by polemic against the opponents’ attempt to boast “in flesh” (Gal 6:13).22 Surely Paul’s choice of the word “flesh [σάρξ]” isconnected to his argument against circumcision.23 Is it possible, however, that Paul’s textual adjustment to the Psalm is more consequential than an alteration to fit his argument against circumcision? ..."
Stewart, Tyler Allen "The Present Evil Age": The Origin and Persistence of Evil in Galatians (pp. 227-228) Marquette University, 2019