The Levitical priests, all the tribe of Levi, shall have no portion or inheritance with Israel. They shall eat the LORD's food offerings as their inheritance.
Deuteronomy 18:1

Levites are objects of charity because they were given no tribal lands in Israel. Landlessness is a kind of poverty in #torah. Service to God and people is the inheritance of the Levites, but by itself, that won't feed and clothe a family, so God commanded the people to take some of what they owe to him and give it to the Levites.