17Abraham fell facedown; he laughed and said to himself, “Will a son be born to a man a hundred years old? Will Sarah bear a child at the age of ninety?”
18And Abraham said to God, “If only Ishmael might live under your blessing!” 19Then God said, “Yes, but your wife Sarah will bear you a son, and you will call him Isaac. Isaac means he laughs. I will establish my covenant with him as an everlasting covenant for his descendants after him.