I am God All-Powerful. If you obey me and always do right, I will keep my solemn promise to you and give you more descendants than can be counted.
I promise that you will be the father of many nations. That’s why I now change your name from Abram to Abraham. I will give you a lot of descendants, and in the future they will become great nations. Some of them will even be kings.
Abraham, you and all future members of your family must promise to obey me.
I will always keep the promise I have made to you and your descendants, because I am your God and their God. I will give you and them the land in which you are now a foreigner. I will give the whole land of Canaan to your family forever, and I will be their God.
As the sign that you are keeping this promise, you must circumcise every man and boy in your family. Any man who isn’t circumcised hasn’t kept his promise to me and cannot be one of my people.
Abraham, your wife’s name will now be Sarah instead of Sarai. I will bless her, and you will have a son by her. She will become the mother of nations, and some of her descendants will even be kings.
“I am almost a hundred years old. How can I become a father? And Sarah is ninety. How can she have a child?”
“Why not let Ishmael inherit what you have promised me?”
No! You and Sarah will have a son. His name will be Isaac, and I will make an everlasting promise to him and his descendants. I have heard what you asked me to do for Ishmael, and so I will also bless him with many descendants. He will be the father of twelve princes, and I will make his family a great nation
On that same day Abraham obeyed God by circumcising Ishmael. Abraham was also circumcised, and so were all other men and boys in his household, including his servants and slaves. He was ninety-nine years old at the time, and his son Ishmael was thirteen.
But your son Isaac will be born about this time next year, and the promise I am making to you and your family will be for him and his descendants forever.