Genesis 17:11-12

New International Version

¹¹ You are to undergo circumcision,^(A) and it will be the sign of the covenant^(B) between me and you. ¹² For the generations to come^(C) every male among you who is eight days old must be circumcised,^(D) including those born in your household or bought with money from a foreigner—those who are not your offspring.