Numbers 18:21-23

Young's Literal Translation

²¹ and to the sons of Levi, lo, I have given all the tenth in Israel for inheritance in exchange for their service which they are serving -- the service of the tent of meeting.

²² `And the sons of Israel come no more near unto the tent of meeting, to bear sin, to die,

²³ and the Levites have done the service of the tent of meeting, and they -- they bear their iniquity; a statute age-during to your generations, that in the midst of the sons of Israel they have no inheritance;