Priests were to Live by the Altar As They had No Inheritance

The Levitical priests—indeed the whole tribe of Levi—shall have no portion or inheritance with Israel. They are to eat the food offerings to the LORD; that is their inheritance.

Although they have no inheritance among their brothers, the LORD is their inheritance, as He promised them.

Do you not know that those who work in the temple eat of its food, and those who serve at the altar partake of its offerings?