Genesis 17:14-16

Any uncircumcised male, who has not been circumcised in the flesh, will be cut off from his people; he has broken my covenant.’ God also said to Abraham, ‘As for Sarai your wife, you are no longer to call her Sarai; her name will be Sarah. I will bless her and will surely give you a son by her. I will bless her so that she will be the mother of nations; kings of peoples will come from her.’