Numbers 18:5-7

Living Bible

⁵ Remember, only the priests are to perform the sacred duties within the sanctuary and at the altar. If you follow these instructions, the wrath of God will never again fall upon any of the people of Israel for violating this law. ⁶ I say it again—your kinsmen the Levites are your assistants for the work of the Tabernacle. They are a gift to you from the Lord. ⁷ But you and your sons, the priests, shall personally handle all the sacred service, including the altar and all that is within the veil, for the priesthood is your special gift of service. Anyone else who attempts to perform these duties shall die.”