Cross reference
Numbers 18:26
26 Say to the Levites, When you take from the children of Israel the tenth which I have given to you from them as your heritage, a tenth part of that tenth is to be offered as an offering lifted up before the Lord.
Nehemiah 10:38
38 And the priest, the son of Aaron, is to be with the Levites, when the Levites take the tenths: and the Levites are to take a tenth of the tenths into the house of our God, to the rooms, into the store-house;
Numbers 18:21
21 And to the children of Levi I have given as their heritage all the tenths offered in Israel, as payment for the work they do, the work of the Tent of meeting.