4 Bible Verses about Justification Excluding Boasting

Where then is the [basis for] boasting [i.e., over being right with God]? There is not any. Is it by [obedience to] a law? Is it by doing certain deeds? Not at all, but by a law of faith. For we conclude that a person is made right with God by faith [in Christ], apart from [obedience to] the requirements of a law [or, the law of Moses, See verse 20].

For if Abraham had been made right with God by doing good deeds he would have had something to boast about, but not in God's presence.

And He chose what the world considers insignificant and contemptible, and [even] what it considers "nothing," in order to nullify what appears to be something.

For you have been saved by God's unearned favor, through [your] faith, and that [salvation] was not the result of your own doing; it was the gift from God.