Genesis 17:23-26

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

24Abraham was ninety-nine years old when he was circumcised in the flesh of his foreskin.

25And Ishmael his son was thirteen years old when he was circumcised in the flesh of his foreskin.

26That very same day Abraham was circumcised, and his son Ishmael;