Genesis 17:23-27 - Abraham's Household Circumcised
23 So Abraham took Ishmael his son and all born of his house and all bought with his silver - every male among the men of the house of Abraham, - and circumcised the flesh of their foreskin on this selfsame day, according to that which God had spoken with him. 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 On this selfsame day, was Abraham circumcised, - and Ishmael his son; 27 and, all the men of his house, born of his house, and bought with silver from the son of a stranger, were circumcised with him.