Genesis 17:18-22

And Abraham said to God, “Oh that Ishmael might live before You!”

But God said, “No, but your wife Sarah will bear you a son, and you shall name him Isaac; and I will establish My covenant with him as an everlasting covenant for his descendants after him.

As for Ishmael, I have heard you; behold, I will bless him, and make him fruitful and multiply him exceedingly. He shall father twelve princes, and I will make him into a great nation.

But I will establish My covenant with Isaac, whom Sarah will bear to you at this season next year.”

When He finished talking with him, God went up from Abraham.