15. God said to Abraham, “As for your wife Sarai, do not call her Sarai, for Sarah will be her name.
16. I 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.”
17. Abraham 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? ”
18. So Abraham said to God, “If only Ishmael were acceptable to You! ”
19. But God said, “No. Your wife Sarah will bear you a son, and you will name him Isaac. I will confirm My covenant with him as an everlasting covenant for his future offspring.
20. As for Ishmael, I have heard you. I will certainly bless him; I will make him fruitful and will multiply him greatly. He will father 12 tribal leaders, and I will make him into a great nation.