Genesis 17:8-10 International Standard Version (ISV)
8 I’ll give to you and to your descendants the land to which you have traveled—all the land of Canaan—as an eternal possession. I will be their God.”
The Sign of the Covenant
9 God continued to speak to Abraham, “You and your descendants who are born in the future are to keep my covenant—that is, you and your descendants, generation after generation. 10 Here is my covenant that you are to observe, between me and you and your descendants: Every male among you is to be circumcised.