Genesis 17:9-11

Darby Translation

⁹ And God said to Abraham, And [as for] thee, thou shalt keep my covenant, thou and thy seed after thee in their generations.

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.