4 Bible Verses about Justification Excluding Boasting

Where then is the boasting? It is excluded. By what law? of works? Nay; but by the law of faith. We conclude therefore, that a man is accepted as righteous through faith, without the works of the Law.

For if Abraham was accepted as righteous through works, he hath ground of boasting. But he hath no ground of boasting before God.

and the mean things of the world, and the things which are despised, did God choose, the things which are not, to bring to nought things that are;

For by grace ye have been saved, through faith; and this is not of yourselves; it is the gift of God;