Genesis 17:7-8

17:7 I will confirm my covenant as a perpetual covenant between me and you. It will extend to your descendants after you throughout their generations. I will be your God and the God of your descendants after you. 17:8 I will give the whole land of Canaan – the land where you are now residing – to you and your descendants after you as a permanent possession. I will be their God.”

Genesis 17:13

17:13 They must indeed be circumcised, whether born in your house or bought with money. The sign of my covenant will be visible in your flesh as a permanent reminder.