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.
I have chosen him to teach his family to obey me for ever and to do what is right and fair. Then I will give Abraham many descendants, just as I promised.”