Numbers 1:50,52,53
But you shall appoint the Levites over the tabernacle of testimony, and over all the vessels thereof, and over all things that belong to it: they shall bear the tabernacle, and all the vessels thereof; and they shall minister to it, and shall encamp round about the tabernacle.
Torrey's Topical Textbook—AKJV

Numbers 3:23,29,35
The families of the Gershonites shall pitch behind the tabernacle westward.
Torrey's Topical Textbook—AKJV