Genesis 17:27

An all the men of his house, born in the house, and bought with money of the stranger, were circumcised with him.

Genesis 17:23

And Abraham took Ishmael his son, and all that were born in his house, and all that were bought with his money, every male among the men of Abraham's house; and circumcised the flesh of their foreskin in the selfsame day, as God had said unto him.