Genesis 17:10-12

Complete Jewish Bible

¹⁰ Here is my covenant, which you are to keep, between me and you, along with your descendants after you: every male among you is to be circumcised. ¹¹ You are to be circumcised in the flesh of your foreskin; this will be the sign of the covenant between me and you. ¹² Generation after generation, every male among you who is eight days old is to be circumcised, including slaves born within your household and those bought from a foreigner not descended from you.