Romans 4:16-18

¹⁶For this reason it is by faith, in order that it may be in accordance with grace, so that the promise will be guaranteed to all the descendants, not only to those who are of the Law, but also to those who are of the faith of Abraham, who is the father of us all, ¹⁷(as it is written: “I have made you a father of many nations”) in the presence of Him whom he believed, that is, God, who gives life to the dead and calls into being things that do not exist. ¹⁸In hope against hope he believed, so that he might become a father of many nations according to that which had been spoken, “So shall your descendants be.”