Genesis 17:1-9

1And when Abram was ninety years old and nine, Yhwh appeared to Abram, and said unto him, I am the Almighty God; walk before me, and be thou perfect.1 2And I will make my covenant between me and thee, and will multiply thee exceedingly. 3And Abram fell on his face: and God talked with him, saying, 4As for me, behold, my covenant is with thee, and thou shalt be a father of many nations.2 5Neither shall thy name any more be called Abram, but thy name shall be Abraham; for a father of many nations have I made thee.3 6And I will make thee exceeding fruitful, and I will make nations of thee, and kings shall come out of thee. 7And 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. 8And 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.4

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