Numbers 1:50

1:50 But appoint the Levites over the tabernacle of the testimony, over all its furnishings and over everything in it. They must carry the tabernacle and all its furnishings; and they must attend to it and camp around it.

Numbers 3:6

3:6 “Bring the tribe of Levi near, and present them before Aaron the priest, that they may serve him.

Numbers 3:31

3:31 Their responsibilities included the ark, the table, the lampstand, the altars, and the utensils of the sanctuary with which they ministered, the curtain, and all their service.