Genesis 17:1-7, 15-16

When Abram was ninety-nine years old, YAHWEH appeared to him again and said, “I am the God who is more than enough. Live your life in my presence and be blameless. I will confirm my covenant between me and you, and I will greatly multiply your descendants.” Then Abram fell on his face in awe before God, and God said to him, “I establish my covenant with you: “You will become a father of many nations. You will no longer be named Abram because I am changing your name to Abraham, for I have made you a father of many nations. I will make you abundantly fruitful, more than you expect. I will make nations out of you, and kings will trace their lineage back to you. Yes, I will establish my eternal covenant of love between me and you, and it will extend to your descendants throughout their generations. I will be your children’s God, just as I am your God.

God also said to Abraham: “Concerning your wife Sarai, you are not to call her Sarai anymore, but Sarah, ‘My Princess,’ will be her name. I will wonderfully bless her, and I will certainly give you a son through her. Yes, I will bless her greatly, and she will become a mother of nations; kings of nations will arise among her children!”