Numbers 18:24-26

24But the tithe of the Israelites, which they present as an offering to the Lord, I have given to the Levites as an inheritance; therefore I have said to them, ‘They shall have no inheritance among the children of Israel.’ ”

25Then the Lord spoke to Moses, saying,

26“Moreover, you shall speak to the Levites and say to them, ‘When you take from the Israelites the tithe which I have given to you from them as your inheritance, then you shall present an offering from it to the Lord, a tithe of the tithe [paid by the people].