11 You must circumcise the flesh of your foreskins. This will be a reminder of the covenant between me and you.
12 Throughout your generations every male among you who is eight days old must be circumcised, whether born in your house or bought with money from any foreigner who is not one of your descendants.
13 They must indeed be circumcised, whether born in your house or bought with money. The sign of my covenant will be visible in your flesh as a permanent reminder.
14 Any uncircumcised male who has not been circumcised in the flesh of his foreskin will be cut off from his people – he has failed to carry out my requirement.”
15 Then God said to Abraham, “As for your wife, you must no longer call her Sarai; Sarah will be her name.
16 I will bless her and will give you a son through her. I will bless her and she will become a mother of nations. Kings of countries will come from her!”
17 Then Abraham bowed down with his face to the ground and laughed as he said to himself, “Can a son be born to a man who is a hundred years old? Can Sarah bear a child at the age of ninety?”