Romans 4:20-25
Chapter 4
20
He did not doubt or distrust God’s promise, and by being strong in faith, he gave glory to God
21
and was convinced that he who had given the promise had the power to fulfill it.
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Therefore, his faith was credited to him as righteousness.
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Now the words, it was credited to him, were written not for him alone
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but for us too, because we believe in him who raised Jesus, our Lord, from the dead,
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who was delivered for our sins and raised for our justification.

Commentaries
The Promise of Descendants.
Paul broadens Abraham’s “fatherhood” beyond narrow nationalistic limits, which the Jewish people had imposed through the Law and circumcision—the Jews called Abraham “our father.” Paul expands it to a universal scope; from “patriarch of Israel,” he becomes “father of all who believe.”