Genesis 17:7-13

7I will establish My covenant between Me and you and your 1descendants after you throughout their generations for an 2everlasting covenant, 3to be God to you and 4to your 5descendants after you. 86I will give to you and to your 7descendants after you, the land of your sojournings, all the land of Canaan, for an everlasting possession; and 8I will be their God.”

9God said further to Abraham, “Now as for you, 9you shall keep My covenant, you and your 10descendants after you throughout their generations. 1011This is My covenant, which you shall keep, between Me and you and your 12descendants after you: every male among you shall be circumcised. 11And 13you shall be circumcised in the flesh of your foreskin, and it shall be the sign of the covenant between Me and you. 12And every male among you who is 14eight days old shall be circumcised throughout your generations, a servant who is born in the house or who is bought with money from any foreigner, who is not of your 15descendants. 13A servant who is born in your house or 16who is bought with your money shall surely be circumcised; thus shall My covenant be in your flesh for an everlasting covenant.