If there's a foreigner who lives with you and wants to celebrate the Lord's Passover, all the males in their household have to be circumcised. Then he may come and celebrate it, and he shall be treated like a native of the land. But no man who is not circumcised may eat it.
After eight days, the time came for the baby to be circumcised, and he was named Jesus. This was the name given to him by the angel before he had even been conceived.
God also gave Abraham the agreement regarding circumcision, and so when Isaac was born, Abraham circumcised him on the eighth day. Isaac was the father of Jacob, and Jacob the father of the twelve patriarchs.