“knowing that a man is not justified by the works of the law but by faith in Jesus Christ, even we have believed in Christ Jesus, that we might be justified by faith in Christ and not by the works of the law; for by the works of the law no flesh shall be justified.” – Gal. 2:16
I get more pushback on this topic than on any other. It is Bible 101. It is foundational.
“Therefore the law was our tutor to bring us to Christ, that we might be justified by faith. But after faith has come, we are no longer under a tutor.” – Gal. 3:24-25
“But now after you have known God, or rather are known by God, how is it that you turn again to the weak and beggarly elements, to which you desire again to be in bondage?” – Gal. 4:9
“Stand fast therefore in the liberty by which Christ has made us free, and do not be entangled again with a yoke of bondage.” – Galatians 5:1
“You have become estranged from Christ, you who attempt to be justified by law; you have fallen from grace. For we through the Spirit eagerly wait for the hope of righteousness by faith.” – Galatians 5:4-5
And this is just some of the verses… and just in Galatians