Numbers 18:20-24 - Duties Of The Levites
20 And Jehovah said to Aaron, In their land thou shalt have no inheritance, neither shalt thou have any portion among them: I am thy portion and thine inheritance among the children of Israel.
21 And to the children of Levi, behold, I have given all the tithes in Israel for an inheritance, for their service which they perform, the service of the tent of meeting. 22 Neither shall the children of Israel henceforth come near the tent of meeting, to bear sin and die. 23 But the Levite, he shall perform the service of the tent of meeting, and they shall bear their iniquity: it is an everlasting statute throughout your generations. And among the children of Israel shall they possess no inheritance; 24 for I have given for an inheritance to the Levites the tithes of the children of Israel, which they offer as a heave-offering to Jehovah; therefore I have said of them, They shall possess no inheritance among the children of Israel.
47 But the Levites after the tribe of their fathers were not numbered among them. 48 For Jehovah had spoken to Moses, saying, 49 Only thou shalt not number the tribe of Levi, neither take the sum of them among the children of Israel. 50 But thou, appoint the Levites over the tabernacle of testimony, and over all the vessels thereof, and over all things that belong to it: they shall bear the tabernacle, and all its vessels; and they shall serve it, and round about the tabernacle shall they encamp; 51 and when the tabernacle setteth forward, the Levites shall take it down; and when the tabernacle encampeth, the Levites shall set it up; and the stranger that cometh near shall be put to death.
52 And the children of Israel shall encamp every man in his camp, and every man by his own standard, according to their hosts; 53 but the Levites shall encamp round about the tabernacle of testimony, that there come not wrath upon the assembly of the children of Israel; and the Levites shall keep the charge of the tabernacle of testimony. 54 And the children of Israel did so; according to all that Jehovah had commanded Moses, so did they.