Numbers 1:50-51

50 aBut appoint the Levites over the tabernacle of the testimony, and over all its furnishings, and over all that belongs to it. They are to carry the tabernacle and all its furnishings, and they shall take care of it band shall camp around the tabernacle. 51 cWhen the tabernacle is to set out, the Levites shall take it down, and when the tabernacle is to be pitched, the Levites shall set it up. dAnd if any outsider comes near, he shall be put to death.
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