Genesis 17:9-14 New American Standard Bible (NASB)

⁹ God said further to Abraham, “Now as for you, you shall keep My covenant, you and your ^[a]descendants after you throughout their generations. ¹⁰ This is My covenant, which you shall keep, between Me and you and your ^[b]descendants after you: every male among you shall be circumcised. ¹¹ And you shall be circumcised in the flesh of your foreskin, and it shall be the sign of the covenant between Me and you. ¹² And every male among you who is eight days old shall be circumcised throughout your generations, a servant who is born in the house or who is bought with money from any foreigner, who is not of your ^[c]descendants. ¹³ A servant who is born in your house or who is bought with your money shall surely be circumcised; thus shall My covenant be in your flesh for an everlasting covenant. ¹⁴ But an uncircumcised male who is not circumcised in the flesh of his foreskin, that person shall be cut off from his people; he has broken My covenant.”