"I will make my covenant with you. It will last forever. It will be between me and you and your children after you for all time to come. I will be your God. And I will be the God of all of your family after you.
"You are now living in Canaan as an outsider. But I will give you the whole land of Canaan. You will own it forever. So will your children after you. And I will be their God."
It must be done for all time to come. "Every male among you who is eight days old must be circumcised. That includes those who are born in your house. It also includes those who are bought with money from a stranger. Even those who are not your own children must be included.
Any male who is born in your house or bought with your money must be circumcised. "My covenant will last forever. Your body will have the mark of my covenant on it.
I will give her my blessing. You can be sure that I will give you a son by her. I will bless her so that she will be the mother of nations. Kings of nations will come from her."
Abraham fell with his face to the ground. He laughed and said to himself, "Will a son be born to a man who is 100 years old? Will Sarah have a child at the age of 90?"
Then God said, "I will bless Ishmael. But your wife Sarah will have a son by you. And you will name him Isaac. I will establish my covenant with him. It will be a covenant that lasts forever. It will be for Isaac and for his family after him.
"As for Ishmael, I have heard you. You can be sure that I will bless him. I will give him children. I will greatly increase his numbers. He will be the father of 12 rulers. And I will make him into a great nation.
On that very day Abraham circumcised his son Ishmael. He also circumcised every male who was born in his house or bought with his money. He did exactly as God had told him.