Romans (Rom) 4:1-3

Then what should we say Avraham, our forefather, obtained by his own efforts? For if Avraham came to be considered righteous by God because of legalistic observances, then he has something to boast about. But this is not how it is before God! For what does the Tanakh say? “Avraham put his trust in God, and it was credited to his account as righteousness.”