Genesis 17:1, 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. Genesis 17:5, Neither shall thy name anymore be called Abram, but thy name shall be called Abraham, for a father of many nations have I made thee. Genesis 17:15, And God said to Abram, As for thy wife, thou shall not call her Sarai, but Sarah shall her name be.