On that same day Abraham obeyed God by circumcising Ishmael. Abraham was also circumcised, and so were all the other men and boys in his household, including his servants and slaves. He was 99 years old at the time, and his son Ishmael was 13.
I have chosen him to teach his family to obey me forever and to do what is right and fair. If they do, I will give Abraham many descendants, just as I promised.”