RKJNT(i)
16 Therefore it is by faith, that it might be by grace; so that the promise might be certain to all his 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,) before him in whom he believed, even God, who gives life to the dead, and calls into being those things which are not.
18 Against all hope he believed, that he might become the father of many nations, according to that which was spoken, So shall your descendants be.
19 And he did not weaken in faith when he considered his own body, now as good as dead, for he was about a hundred years old, or the deadness of Sarah's womb:
20 He did not waver through unbelief in the promise of God; but was strong in faith, giving glory to God;
21 And was fully persuaded that, what he had promised, he was able also to perform.