Deuteronomy 10:8-9

8At that time the Lord set apart the tribe of Levi to carry the Ark of the Lord’s Covenant, and to stand before the Lord as his ministers, and to pronounce blessings in his name. These are their duties to this day.

9That is why the Levites have no share of property or possession of land among the other Israelite tribes. The Lord himself is their special possession, as the Lord your God told them.)