Numbers 1:52-53

1:52 “The Israelites will camp according to their divisions, each man in his camp, and each man by his standard. 1:53 But the Levites must camp around the tabernacle of the testimony, so that the Lord’s anger will not fall on the Israelite community. The Levites are responsible for the care of the tabernacle of the testimony.”

Numbers 3:8

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.

Zechariah 3:7

3:7 “The Lord who rules over all says, ‘If you live and work according to my requirements, you will be able to preside over my temple and attend to my courtyards, and I will allow you to come and go among these others who are standing by you.