Numbers 1:48-54

48 For the Lord said to Moses,
49 Only the tribe of Levi is not to be numbered among the children of Israel,
50 But to them you are to give the care of the Tent of meeting with its vessels and everything in it: they are to take up the Tent, and be responsible for everything to do with it, and put up their tents round it.
51 And when the Tent of meeting goes forward, the Levites are to take it down; and when it is to be put up, they are to do it: any strange person who comes near it is to be put to death.
52 The children of Israel are to put up their tents, every man in his tent-circle round his flag.
53 But the tents of the Levites are to be round the Tent of meeting, so that wrath may not come on the children of Israel: the Tent of meeting is to be in the care of the Levites.
54 So the children of Israel did as the Lord had given orders to Moses.
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