Genesis 17: 1-7, 15-16
The Sign of the Covenant
17 When Abram was ninety-nine years old, the Lord appeared to Abram, and said to him, “I am God Almighty;[a] walk before me, and be blameless. 2 And I will make my covenant between me and you, and will make you exceedingly numerous.” 3 Then Abram fell on his face; and God said to him, 4 “As for me, this is my covenant with you: You shall be the ancestor of a multitude of nations. 5 No longer shall your name be Abram,[b] but your name shall be Abraham;[c] for I have made you the ancestor of a multitude of nations. 6 I will make you exceedingly fruitful; and I will make nations of you, and kings shall come from you. 7 I will establish my covenant between me and you, and your offspring after you throughout their generations, for an everlasting covenant, to be God to you and to your offspring[d] after you.
15 God said to Abraham, “As for Sarai your wife, you shall not call her Sarai, but Sarah shall be her name. 16 I will bless her, and moreover I will give you a son by her. I will bless her, and she shall give rise to nations; kings of peoples shall come from her.”
This is the Word of the Lord.
Thanks be to God.