13. a slave born in your house, as well as one purchased with money, must be circumcised. My covenant will be marked in your flesh as an everlasting covenant.
14. If any male is not circumcised in the flesh of his foreskin, that man will be cut off from his people; he has broken My covenant.”
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.
21. But I will confirm My covenant with Isaac, whom Sarah will bear to you at this time next year.”
22. When He finished talking with him, God withdrew from Abraham.