Genesis 17:11-13

Holman Christian Standard Bible

¹¹ You must circumcise the flesh of your foreskin to serve as a sign of the covenant between Me and you.^{[a](A) 12} Throughout your generations, every male among you at eight days old is to be circumcised.^(B) This includes a slave born in your house and one purchased with money from any foreigner. The one who is not your offspring, ¹³ a slave born in your house, as well as one purchased with money, must be circumcised. My covenant will be marked in your flesh as an everlasting covenant.