Romans 4:1-5, 18-25
What then shall we say that Abraham, our forefather, discovered in this matter? (2) If, in fact, Abraham was justified by works, he had something to boast about--but not before God. (3) What does the Scripture say? "Abraham believed God, and it was credited to him as righteousness." (4) Now when a man works, his wages are not credited to him as a gift, but as an obligation. (5) However, to the man who does not work but trusts God who justifies the wicked, his faith is credited as righteousness.
(18) Against all hope, Abraham in hope believed and so became the father of many nations, just as it had been said to him, "So shall your offspring be." (19) Without weakening in his faith, he faced the fact that his body was as good as dead--since he was about a hundred years old--and that Sarah's womb was also dead.(20) Yet he did not waver through unbelief regarding the promise of God, but was strengthened in his faith and gave glory to God, (21) being fully persuaded that God had power to do what he had promised. (22) This is why "it was credited to him as righteousness." (23) The words "it was credited to him" were written not for him alone,(24) but also for us, to whom God will credit righteousness--for us who believe in him who raised Jesus our Lord from the dead. (25) He was delivered over to death for our sins and was raised to life for our justification.