Genesis 17:23-27

23So Abraham took his son Ishmael, everyone born in his household, and everyone bought with money—every male in his household—and circumcised them that day, as God had told him.

24Abraham was 99 years old when he was circumcised.

25His son Ishmael was 13 years old when he was circumcised.

26That same day Abraham and his son Ishmael were circumcised.

27All the men of his household, whether born in the household or bought with money from a foreigner, were circumcised with him.