Genesis 17:9

9 And God said unto Abraham, Thou shalt keep my covenant therefore, thou, and thy seed after thee in their generations.

Genesis 17:9 In-Context

7 And I will establish my covenant between me and thee and thy seed after thee in their generations for an everlasting covenant, to be a God unto thee, and to thy seed after thee.
8 And I will give unto thee, and to thy seed after thee, the land wherein thou art a stranger, all the land of Canaan, for an everlasting possession; and I will be their God.
9 And God said unto Abraham, Thou shalt keep my covenant therefore, 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; Every man child among you shall be circumcised .
11 And ye shall circumcise the flesh of your foreskin; and it shall be a token of the covenant betwixt me and you.
The King James Version is in the public domain.