“Foreigners may want to celebrate the Lord’s Passover. First, every male in the household must be circumcised. Then they may celebrate the Passover like native-born Israelites. But no uncircumcised males may ever eat the Passover meal.
“God gave Abraham circumcision to confirm his promise. So when Abraham’s son Isaac was born, Abraham circumcised him on the eighth day. Isaac did the same to his son Jacob, and Jacob did the same to his twelve sons (the ancestors of our tribes).