Numbers 18:6 CPDV

⁴  But they may be with you, and they may watch over the care of the tabernacle and all its ceremonies. A foreigner shall not be mixed with you.

⁵  Watch over the care of the Sanctuary, and over the ministry of the altar, lest an indignation may rise over the sons of Israel.

⁶  I have given your brothers, the Levites, to you from the midst of the sons of Israel, and I have delivered them as a gift to the Lord, in order to serve in the ministries of his tabernacle.

⁷  But as for you and your sons: guard the priesthood. For all that pertains to the service of the altar and of what is beyond the veil shall be exercised by the priests. If any outsider will approach, he shall be killed.'

⁸  And the Lord said to Aaron: 'Behold, I have given you custody of my first-fruits. Everything that is sanctified by the sons of Israel I have delivered to you and your sons, for the office of the priesthood, by everlasting ordinances.