Numbers 18:30-32

30Therefore you shall say to them: ‘When you have lifted up the best of it, then the rest shall be accounted to the Levites as the produce of the threshing floor and as the produce of the winepress.

31You may eat it in any place, you and your households, for it is your reward for your work in the tabernacle of meeting.

32And you shall bear no sin because of it, when you have lifted up the best of it. But you shall not profane the holy gifts of the children of Israel, lest you die.’ ”