Genesis 17:19-23 English Standard Version (ESV)

19. God said, “No, but Sarah your wife shall bear you a son, and you shall call his name Isaac. I will establish my covenant with him as an everlasting covenant for his offspring after him.

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

21. But I will establish my covenant with Isaac, whom Sarah shall bear to you at this time next year.”

22. When he had finished talking with him, God went up from Abraham.

23. Then Abraham took Ishmael his son and all those born in his house or bought with his money, every male among the men of Abraham’s house, and he circumcised the flesh of their foreskins that very day, as God had said to him.

Genesis 17