Numbers 1:51-53

⁵¹When the tabernacle is to move to another place, the Levites must take it down. When the tabernacle is to be set up, the Levites must set it up. Any stranger who comes near the tabernacle must be killed.

⁵²When the people of Israel set up their tents, each man must do so near the banner that belongs to his armed group.

⁵³However, the Levites must set up their tents around the tabernacle of the covenant decrees so that my anger does not come upon the people of Israel. The Levites must care for the tabernacle of the covenant decrees.”