3 And the Levites shall stand watch by your precepts, and for all the works of the tabernacle; yet in such a manner that they shall not approach the vessels of the Sanctuary and of the altar, lest both they die, and you perish, at the same time.
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.
9 Therefore, you shall receive these, from the things that are sanctified and offered to the Lord. Every offering, and sacrifice, and whatever is repaid to me, on behalf of sin and also for offenses, and which becomes the Holy of holies, shall be for you and for your sons.