Genesis 17:23-27

23On that very day Abraham took his son Ishmael and all those born in his household or bought with his money, every male in his household, and circumcised them, as God told him. 24Abraham was ninety-nine years old when he was circumcised, 25and his son Ishmael was thirteen; 26Abraham and his son Ishmael were both circumcised on that very day. 27And every male in Abraham’s household, including those born in his household or bought from a foreigner, was circumcised with him.