Numbers 18:25-32

25Then the Lord spoke to Moses, saying,

26“Speak thus to the Levites, and say to them: ‘When you take from the children of Israel the tithes which I have given you from them as your inheritance, then you shall offer up a heave offering of it to the Lord, a tenth of the tithe.

27And your heave offering shall be reckoned to you as though it were the grain of the threshing floor and as the fullness of the winepress.

28Thus you shall also offer a heave offering to the Lord from all your tithes which you receive from the children of Israel, and you shall give the Lord’s heave offering from it to Aaron the priest.

29Of all your gifts you shall offer up every heave offering due to the Lord, from all the best of them, the consecrated part of them.’

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.’ ”