Genesis 17:10-12

International Standard Version

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. ¹¹ You are all to be circumcised in the flesh of your foreskin, and this is to be the sign of the covenant between me and you. ¹² Generation after generation, every male among you is to be circumcised on the eighth day after his birth,^[a] including the servant born in your house or the one purchased from a foreigner, who is not of your offspring.