Numbers 18:21–26

²¹And 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. ²²Neither shall the children of Israel henceforth come near the tent of meeting, to bear sin and die. ²³But 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; ²⁴for 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. ²⁵And Jehovah spoke to Moses, saying, ²⁶And to the Levites shalt thou speak, and say unto them, When ye take of the children of Israel the tithes which I have given you from them for your inheritance, then ye shall offer a heave-offering from it for Jehovah, the tenth of the tithe.