'Righteousness of Faith' in the Bible

And he received the sign of circumcision as seal of the righteousness of faith which he had being in uncircumcision, that he might be the father of all them that believe being in uncircumcision, that righteousness might be reckoned to them also;

For it was not by law that the promise was to Abraham, or to his seed, that he should be heir of the world, but by righteousness of faith.

But the righteousness of faith speaks thus: Do not say in thine heart, Who shall ascend to the heavens? that is, to bring Christ down;