Numbers 18:3-5

3They shall keep guard over you and aover the whole tent, bbut shall not come near to the vessels of the sanctuary or to the altar clest they, and you, die. 4They shall join you and keep guard over the tent of meeting for all the service of the tent, dand no outsider shall come near you. 5And you shall ekeep guard over the sanctuary and over the altar, fthat there may never again be wrath on the people of Israel.
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