What then are we to say was gained by Abraham, our ancestor according to the flesh?
References for Romans 4:1
For if Abraham was justified by works, he has something to boast about, but not before God.
For what does the scripture say? "Abraham believed God, and it was reckoned to him as righteousness."
Now to one who works, wages are not reckoned as a gift but as something due.
But to one who without works trusts him who justifies the ungodly, such faith is reckoned as righteousness.
So also David speaks of the blessedness of those to whom God reckons righteousness apart from works: