"Behold, I have given the children of Levi all the tithes in Israel as an inheritance in return for the work which they perform, the work of the tabernacle of meeting.
Numbers 18:21
Surrounding context
18:20 Then the LORD 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.
18:21 "Behold, I have given the children of Levi all the tithes in Israel as an inheritance in return for the work which they perform, the work of the tabernacle of meeting.
18:22 Hereafter the children of Israel shall not come near the tabernacle of meeting, lest they bear sin and die.