Genesis 17:7; Genesis 17:9; Genesis 17:12

7 I will establish my covenant as an everlasting covenant between me and you and your descendants after you for the generations to come, to be your God and the God of your descendants after you.

9 Then God said to Abraham, “As for you, you must keep my covenant, you and your descendants after you for the generations to come.

12 For the generations to come every male among you who is eight days old must be circumcised, including those born in your household or bought with money from a foreigner—those who are not your offspring.