19. Then God said, ‘Yes, but your wife Sarah will bear you a son, and you will call him Isaac. I will establish my covenant with him as an everlasting covenant for his descendants after him.
20. And as for Ishmael, I have heard you: I will surely bless him; I will make him fruitful and will greatly increase his numbers. He will be the father of twelve rulers, and I will make him into a great nation.
21. But my covenant I will establish with Isaac, whom Sarah will bear to you by this time next year.’
22. When he had finished speaking with Abraham, God went up from him.