Genesis 17:24-27 ▼

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

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

26 In the very same day Abraham was circumcised, and Ishmael his son.

27 Now all the men of his household, who were born in the house or bought with money from a foreigner, were circumcised with him.