Numbers 18:23-24

²³and 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;

²⁴but the tithe of the sons of Israel which they lift up to Jehovah, a heave-offering, I have given to the Levites for inheritance; therefore I have said of them, In the midst of the sons of Israel they have no inheritance.'