Genesis 17:7-13

7I will make my promise to you and your descendants for generations to come as an everlasting promise. I will be your God and the God of your descendants.

8I am also giving this land where you are living—all of Canaan—to you and your descendants as your permanent possession. And I will be your God.”

9God also said to Abraham, “You and your descendants in generations to come are to be faithful to my promise.

10This is how you are to be faithful to my promise: Every male among you is to be circumcised.

11All of you must be circumcised. That will be the sign of the promise from me to you.

12For generations to come every male child who is eight days old must be circumcised, whether he is born in your household or bought with money from a foreigner who’s not related to you.

13Every male born in your household or bought with your money is to be circumcised without exception. So my promise will be a sign on your flesh, an everlasting promise.