17. Abraham fell on his face and laughed. He said to himself, Can a 100-year-old man become a father, or Sarah, a 90-year-old woman, have a child?
18. To God Abraham said, "If only you would accept Ishmael!"
19. But God said, "No, your wife Sarah will give birth to a son for you, and you will name him Isaac. I will set up my covenant with him and with his descendants after him as an enduring covenant.
20. As for Ishmael, I’ve heard your request. I will bless him and make him fertile and give him many, many descendants. He will be the ancestor of twelve tribal leaders, and I will make a great nation of him.
21. But I will set up my covenant with Isaac, who will be born to Sarah at this time next year.”
22. When God finished speaking to him, God ascended, leaving Abraham alone.
23. Abraham took his son Ishmael, all those born in his household, and all those purchased with his silver—that is, every male in Abraham’s household—and he circumcised the flesh of their foreskins that same day, just as God had told him to do.