Numbers 18:20

17 `Only, the firstling of a cow, or the firstling of a sheep, or the firstling of a goat, thou dost not ransom, holy they [are]: their blood thou dost sprinkle on the altar, and of their fat thou makest perfume, a fire-offering of sweet fragrance to Jehovah,

18 and their flesh is thine, as the breast of the wave-offering, and as the right leg, it is thine;

19 all the heave-offerings of the holy things which the sons of Israel lift up to Jehovah I have given to thee and to thy sons, and to thy daughters with thee, by a statute age-during, a covenant of salt, age-during it [is] before Jehovah, to thee and to thy seed with thee.`

20 And Jehovah saith unto Aaron, `In their land thou dost not inherit, and a portion thou hast not in their midst: I [am] thy portion, and thine inheritance in the midst of the sons of Israel;

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;