Genesis 17:6-11

I will make you abundantly fruitful, more than you expect. I will make nations out of you, and kings will trace their lineage back to you. Yes, I will establish my eternal covenant of love between me and you, and it will extend to your descendants throughout their generations. I will be your children’s God, just as I am your God. I will give to you and your seed the land to which you have migrated. The entire land of Canaan will be yours and your descendants’ as an everlasting possession. And I will be their God forever!” God explained to Abraham, “Your part of the covenant is to obey its terms, you and your descendants throughout the ages. So here is the sign of the covenant that you are to keep, so that it will endure between you and me and your descendants: circumcise every male among you. You must undergo cutting off the flesh of your foreskin as a special sign of the covenant between me and you.