Numbers 18:20-24 - Duties Of The Levites
20 And the LORD spoke unto Aaron, Thou shalt have no inheritance in their land, neither shalt thou have any part among them. I am thy part and thine inheritance among the sons of Israel.
21 And, behold, I have given the sons of Levi all the tithes in Israel for an inheritance, for their ministry because they serve in the ministry of the tabernacle of the testimony. 22 Neither must the sons of Israel from now on come near the tabernacle of the testimony lest they bear sin and die because of it. 23 But the Levites shall do the service of the tabernacle of the testimony, and they shall bear their iniquity by a perpetual statute throughout your ages, and they shall not possess an inheritance among the sons of Israel. 24 For unto the Levites I have given the tithes of the sons of Israel as inheritance, which they shall offer unto the LORD as offerings; therefore, I have said unto them, Among the sons of Israel they shall possess no inheritance.
47 But the Levites according to the tribe of their fathers were not numbered among them. 48 For the LORD had spoken unto Moses, saying, 49 Only thou shalt not number the tribe of Levi, neither take the sum of them among the sons of Israel; 50 But thou shalt place the Levites in the tabernacle of the 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 in it and shall encamp round about the tabernacle. 51 And when the tabernacle departs, the Levites shall take it down; and when the tabernacle is to be pitched, the Levites shall set it up; and the stranger that comes near shall be put to death.
52 And the sons of Israel shall pitch their tents, each man by his own camp and each man by his own standard, throughout their hosts. 53 But the Levites shall pitch round about the tabernacle of the testimony that there be no wrath upon the congregation of the sons of Israel; and the Levites shall keep the charge of the tabernacle of the testimony. 54 And the sons of Israel did according to all that the LORD commanded Moses, so did they.