Numbers 1:51-53

CAB(i) 51 And in removing the tabernacle, the Levites shall take it down, and in pitching the tabernacle they shall set it up: and let the stranger that advances to touch it die. 52 And the children of Israel shall encamp, every man in his own order, and every man according to his company, with their army. 53 But let the Levites encamp round about the tabernacle of witness fronting it, and so there shall be no sin among the children of Israel; and the Levites themselves shall keep the guard of the tabernacle of witness.