Numbers 3:7-8

3:7 They are responsible for his needs and the needs of the whole community before the tent of meeting, by attending to the service of the tabernacle. 3:8 And they are responsible for all the furnishings of the tent of meeting, and for the needs of the Israelites, as they serve in the tabernacle.

Numbers 7:5

7:5 “Receive these gifts from them, that they may be used in doing the work of the tent of meeting; and you must give them to the Levites, to every man as his service requires.”