Romans 4:20-24

But he did not doubt or waver in unbelief concerning the promise of God, but he grew strong and empowered by faith, giving glory to God, being fully convinced that God had the power to do what He had promised. Therefore his faith WAS CREDITED TO HIM AS RIGHTEOUSNESS (right standing with God). [Gen 15:6] Now not for his sake alone was it written that it was credited to him, but for our sake also—to whom righteousness will be credited, as those who believe in Him who raised Jesus our Lord from the dead