Romans 4:3 provides the scriptural foundation — Abraham's belief was credited as righteousness — which 4:22 refers to.

Romans 3:22 introduces righteousness through faith in Christ — the same principle Paul applies to Abraham here.

Romans 9:30 shows Gentiles attaining righteousness by faith — the same pattern seen in Abraham's example here.

Genesis 15:6 is the original source Paul quotes — Abraham's faith credited as righteousness.

Galatians 3:6 also cites Genesis 15:6, making the same argument about justification by faith.

James 2:23 quotes the same verse — Abraham credited with righteousness — but links it to his works, offering a complementary perspective.