Genesis 17:17-19

New Revised Standard Version, Anglicised Catholic Edition

¹⁷ Then Abraham fell on his face and laughed, and said to himself, ‘Can a child be born to a man who is a hundred years old? Can Sarah, who is ninety years old, bear a child?’ ¹⁸ And Abraham said to God, ‘O that Ishmael might live in your sight!’ ¹⁹ God said, ‘No, but your wife Sarah shall bear you a son, and you shall name him Isaac.^[a] I will establish my covenant with him as an everlasting covenant for his offspring after him.