Genesis 17:1-5

And when Abram was ninety years old and nine, the LORD appeared to Abram, and said unto him, I am the Almighty God; walk before me, and be thou perfect.

And I will make my covenant between me and thee, and will multiply thee exceedingly.

And Abram fell on his face: and God talked with him, saying,

As for me, behold, my covenant is with thee, and thou shalt be a father of many nations.

Neither shall thy name any more be called Abram, but thy name shall be Abraham; for a father of many nations have I made thee.