Genesis 17:15-17

15God said to Abraham, “As for your wife Sarai, do not call her Sarai, for Sarah will be her name.

16I will bless her; indeed, I will give you a son by her. I will bless her, and she will produce nations; kings of peoples will come from her.”

17Abraham fell facedown. Then he laughed and said to himself, “Can a child be born to a hundred-year-old man? Can Sarah, a ninety-year-old woman, give birth?”