Genesis 17:4-14

4“As for Me, behold, My covenant is with you, And you will be the father of a 1multitude of nations.5No longer shall your name be called 2Abram, But 3your name shall be 4Abraham; For 5I have made you the father of a multitude of nations. 6I will make you exceedingly fruitful, and I will make nations of you, and 6kings will come forth from you. 7I will establish My covenant between Me and you and your 7descendants after you throughout their generations for an 8everlasting covenant, 9to be God to you and 10to your 11descendants after you. 812I will give to you and to your 13descendants after you, the land of your sojournings, all the land of Canaan, for an everlasting possession; and 14I will be their God.”

9God said further to Abraham, “Now as for you, 15you shall keep My covenant, you and your 16descendants after you throughout their generations. 1017This is My covenant, which you shall keep, between Me and you and your 18descendants after you: every male among you shall be circumcised. 11And 19you 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 20eight 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 21descendants. 13A servant who is born in your house or 22who is bought with your money shall surely be circumcised; thus shall My covenant be in your flesh for an everlasting covenant. 14But an uncircumcised male who is not circumcised in the flesh of his foreskin, that person shall be 23cut off from his people; he has broken My covenant.”