Genesis 17:8-10

American Standard Version

⁸ And I will give unto thee, and to thy seed after thee, the land of thy sojournings, all the land of Canaan, for an everlasting possession; and I will be their God.

⁹ And God said unto Abraham, And as for thee, thou shalt keep my covenant, thou, and thy seed after thee throughout their generations. ¹⁰ This is my covenant, which ye shall keep, between me and you and thy seed after thee: every male among you shall be circumcised.