Numbers 18:21–26

²¹And, behold, ^rI have given the children of Levi all the tenth in Israel for an inheritance, for their service which they serve, even ^sthe service of the tabernacle of the congregation. ^22tNeither must the children of Israel henceforth come nigh the tabernacle of the congregation, ^ulest they bear sin, ^†and die. ²³But the Levites ^wshall do the service of the tabernacle of the congregation, and ^xthey shall bear their iniquity: it shall be a statute for ever throughout your generations, that among the children of Israel they have no inheritance. ²⁴But the tithes of the children of Israel, which ^ythey offer as an heave offering unto the Lord, I have given to the Levites to inherit: therefore I have said unto them, ^zAmong the children of Israel they shall have no inheritance.

²⁵And the Lord spake unto Moses, saying, ²⁶Thus speak unto the Levites, 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 up an heave offering of it for the Lord, even ^aa tenth part of the tithe.