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.
23. Then Abraham took his son Ishmael and all the slaves born in his house or purchased with his money — every male among the members of Abraham’s household — and he circumcised the flesh of their foreskin on that very day, just as God had said to him.
24. Abraham was 99 years old when the flesh of his foreskin was circumcised,
25. and his son Ishmael was 13 years old when the flesh of his foreskin was circumcised.