Numbers 18:23-24

23 But a the Levites shall do the service of the tent of meeting, b and they shall bear their iniquity. It shall be a perpetual statute throughout your generations, and among the people of Israel they shall have no inheritance. 24 For the tithe of the people of Israel, which c they present as a contribution to the  Lord, I have given to the Levites for an inheritance. Therefore I have said of them that they shall have no inheritance d among the people of Israel.”

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