Genesis 17:10-12

Darby Translation

¹⁰ This is my covenant which ye shall keep, between me and you and thy seed after thee—that every male among you be circumcised.

¹¹ And ye shall circumcise the flesh of your foreskin; and [that] shall be a sign of the covenant between me and you.

¹² And at eight days old shall every male in your generations be circumcised among you—he who is born in the house, and he who is bought with money, any stranger who is not of thy seed.