Romans 4:2-5

Living_Oracles(i) 2 for if Abraham were justified by works, he might boast; but not before God. 3 For what says the scripture? "And Abraham believed God, and it was counted to him for righteousness." 4 Now, to him who works, the reward is not counted as a favor, but as a debt. 5 But to him who does not work, but believes on him who justifies the ungodly, his faith is counted for righteousness.