Priests were to Live by the Altar As They had No Inheritance
Source: TTT
Deuteronomy 18:1, 2
The Levitical priests—indeed the whole tribe of Levi—shall have no portion or inheritance with Israel. They are to eat the offerings made by fire to the LORD; that is their inheritance. / Although they have no inheritance among their brothers, the LORD is their inheritance, as He promised them.
1 Corinthians 9:13
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?