Now when a stranger sojourns with you and keeps the Passover to the Lord, let all his males be circumcised, and then let him come near and keep it. And he shall be as one who is born in the land. However, no uncircumcised person shall eat of it.
Then He gave him the covenant of circumcision. And Abraham became the father of Isaac and circumcised him on the eighth day. And Isaac became the father of Jacob, and Jacob became the father of the twelve patriarchs.