Genesis 17:10-27

10This is what you and all your descendants must do to obey my covenant: Every male person in your family must be circumcised.

11Your circumcision will show that you have agreed to my covenant with you.

12Every male child among you must be circumcised when he is eight days old. You must continue to do this for every generation. Do it for every male that lives with you, not just your own family. Circumcise servants that have been born in your house. Also circumcise foreign servants that you have bought with money.

13You must circumcise all the male servants who work for you in your house. Circumcision will be a mark in your bodies which shows that you accept my covenant. It will continue for all time.

14If any male person among you has not been circumcised, I will not accept him as one of my people. He must become separate from his people. He has not obeyed my covenant.’

15Then God said to Abraham, ‘As for your wife, do not call her Sarai any more. Instead, her name will be Sarah.

16I will bless her. She will give birth to a son for you. Many nations of people will be her descendants. Some of them will become kings. That is how much I will bless her!’

17Abraham fell down so that his face touched the ground. He laughed and he said to himself, ‘I am now 100 years old. That is too old to have a son. Sarah is 90 years old, so she could never give birth to a child. That is too old to have a child.’

18So Abraham said to God, ‘I would be happy if you would bless Ishmael as my son.’

19God said to Abraham, ‘No, your wife Sarah will give birth to a son for you. You must give him the name “Isaac”. I will make my covenant with him and with his descendants for all time.

20I have heard what you want me to do for Ishmael. I will bless him. I will cause him to have many descendants. Among his descendants there will be 12 rulers. His descendants will become a great nation.

21But I will make my covenant with Isaac, not with Ishmael. At about this time next year, Sarah will give birth to your son, Isaac.’

22When God had finished speaking to Abraham, he went away.

23On that same day, Abraham circumcised Ishmael and every male person in his house. He circumcised every male servant that was born in his house, as well as those that he had bought with money. He did this in the way that God had told him.

24Abraham himself was circumcised when he was 99 years old.

25His son, Ishmael, was 13 years old when he was circumcised.

26Abraham and Ishmael were circumcised on the same day.

27As well as them, all the male people living in Abraham's house were circumcised. This included the male servants that had been born in his house and those that he had bought with money.