Genesis 17:7-11

I will establish My covenant between Me and you and your descendants after you throughout their generations as an everlasting covenant, to be God to you and to your descendants after you.

And I will give to you and to your descendants after you the land where you live as a stranger, all the land of Canaan, as an everlasting possession; and I will be their God.”

God said further to Abraham, “Now as for you, you shall keep My covenant, you and your descendants after you throughout their generations.

This is My covenant, which you shall keep, between Me and you and your descendants after you: every male among you shall be circumcised.

And you shall be circumcised in the flesh of your foreskin, and it shall be the sign of the covenant between Me and you.