Genesis 17:18-22

And Abraham said unto God, O that Ishmael might live before thee!

And God said, Sarah thy wife shall bear thee a son indeed; and thou shalt call his name Isaac: and I will establish my covenant with him for an everlasting covenant, and with his seed after him.

And as for Ishmael, I have heard thee: Behold, I have blessed him, and will make him fruitful, and will multiply him exceedingly; twelve princes shall he beget, and I will make him a great nation.

But my covenant will I establish with Isaac, which Sarah shall bear unto thee at this set time in the next year.

And he left off talking with him, and God went up from Abraham.