Genesis 17:10-12 NIV

10 This is my covenant with you and your descendants after you, the covenant you are to keep: Every male among you shall be circumcised.

References for Genesis 17:10

11 You are to undergo circumcision, and it will be the sign of the covenant between me and you.

References for Genesis 17:11

12 For the generations to come every male among you who is eight days old must be circumcised, including those born in your household or bought with money from a foreigner—those who are not your offspring.

References for Genesis 17:12