Numbers 18:20
And Jehovah said to Aaron, You shall have no inheritance in their land, nor shall you have any portion among them; I am your portion and your inheritance among the children of Israel.
Footnote on "no inheritance"
Neither the priests nor the Levites had any inheritance or any portion in the land of Israel. God Himself was their portion and their inheritance among the sons of Israel. Not only was God's food their portion -- God Himself was their portion and inheritance. Because God was their portion and inheritance, they did not need any other portion or inheritance.