Genesis 17:5. 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.
Genesis 17:9. And God said unto Abraham, Thou shalt keep my covenant therefore, thou, and thy seed after thee in their generations.
Genesis 17:15. And God said unto Abraham, As for Sarai thy wife, thou shalt not call her name Sarai, but Sarah shall her name be.
Genesis 17:17. Then Abraham fell upon his face, and laughed, and said in his heart, Shall a child be born unto him that is an hundred years old? and shall Sarah, that is ninety years old, bear?
Genesis 17:18. And Abraham said unto God, O that Ishmael might live before thee!
Genesis 17:22. And he left off talking with him, and God went up from Abraham.
Genesis 17:23. And Abraham took Ishmael his son, and all that were born in his house, and all that were bought with his money, every male among the men of Abraham's house; and circumcised the flesh of their foreskin in the selfsame day, as God had said unto him.
Genesis 17:24. And Abraham was ninety years old and nine, when he was circumcised in the flesh of his foreskin.