Numbers 18:20-24 - Duties Of The Levites
20 And Jehovah will say to Aaron, In their land thou shalt not inherit, and a portion shall not be to thee in the midst of them. I am thy portion and thine inheritance in the midst of the sons of Israel.
21 And to the sons of Levi, behold, I gave all the tenth in Israel for an inheritance for their services which they served, the service of the tent of appointment 22 And the sons of Israel shall no more come near the tent of appointment, to bear sin and to die. 23 And it is the Levite serving the service of the tent of appointment, and they shall bear their iniquity a law forever to your generations, and in the midst of the sons of Israel they shall not inherit an inheritance. 24 For the tenth of the sons of Israel which they shall lift up to Jehovah, an offering I gave to the Levites to inherit: for this I said to them, In the midst of the sons of Israel they shall not inherit an inheritance.
47 And the Levites for the tribe of their fathers were not reviewed in the midst of them. 48 And Jehovah will speak to Moses, saying, 49 But the tribe of Levi thou shalt not review, and their head thou shalt not take in the midst of the sons of Israel. 50 And thou, set the Levites over the dwelling of testimony, and over all its vessels, and over all which is to it: they shall lift up the dwelling and all its vessels, and they shall serve it, and they shall encamp round about the dwelling. 51 And in the removing of the dwelling the Levites shall take it down, and in pitching the dwelling, the Levites shall set it up: and the stranger coming near shall die.
52 And the sons of Israel encamped each by his camp, and each by his flag for their warfare. 53 And the Levites shall encamp round about the dwelling of testimony; and there shall not be anger upon the assembly of the sons of Israel: and the Levites shall watch the watch of the dwelling of testimony. 54 And the sons of Israel shall do according to all which Jehovah commanded Moses; so did they.