Exodus 12:48-50

Revised Standard Version Catholic Edition

⁴⁸ And when a stranger shall sojourn with you and would keep the passover to the Lord, let all his males be circumcised, then he may come near and keep it; he shall be as a native of the land. But no uncircumcised person shall eat of it. ⁴⁹ There shall be one law for the native and for the stranger who sojourns among you.”

⁵⁰ Thus did all the people of Israel; as the Lord commanded Moses and Aaron, so they did.