Romans 4:17-19

Living Bible

¹⁷ That is what the Scriptures mean when they say that God made Abraham the father of many nations. God will accept all people in every nation who trust God as Abraham did. And this promise is from God himself, who makes the dead live again and speaks of future events with as much certainty as though they were already past.

¹⁸ So, when God told Abraham that he would give him a son who would have many descendants and become a great nation, Abraham believed God even though such a promise just couldn’t come to pass! ¹⁹ And because his faith was strong, he didn’t worry about the fact that he was too old to be a father at the age of one hundred, and that Sarah his wife, at ninety,^[a] was also much too old to have a baby.