Numbers 1:52-53 ▼

52 The Israelites shall camp according to their armies, every man by his own camp and every man by his own [tribal] standard (banner).

53 But the Levites shall camp around the tabernacle of the Testimony, so that there will be no wrath against the congregation of the Israelites. The Levites shall be in charge of the tabernacle of the Testimony.”