For what says the scripture? Abraham believed God, and it was counted unto him for righteousness.
All Commentaries on Romans 4:3 Go To Romans 4
Ambrosiaster
AD 400
Paul revealed that Abraham had glory before God not because he was circumcised nor because he abstained from evil, but because he believed in God. For that reason he was justified, and he would receive the reward of praise in the future. Commentary on Paul’s Epistles.