And you: You will honor my covenant, you and your descendants, generation after generation. This is the covenant that you are to honor, the covenant that pulls in all your descendants: Circumcise every male. Circumcise by cutting off the foreskin of the penis; it will be the sign of the covenant between us… That way my covenant will be cut into your body, a permanent mark of my permanent covenant... Then Abraham took his son Ishmael and all his servants, whether houseborn or purchased—every male in his household—and circumcised them, cutting off their foreskins that very day, just as God had told him.  Abraham was ninety-nine years old when he was circumcised.