Genesis 17:11-13

Young's Literal Translation

¹¹ and ye have circumcised the flesh of your foreskin, and it hath become a token of a covenant between Me and you.

¹² `And a son of eight days is circumcised by you; every male to your generations, born in the house, or bought with money from any son of a stranger, who is not of thy seed;

¹³ he is certainly circumcised who [is] born in thine house, or bought with thy money; and My covenant hath become in your flesh a covenant age-during;