Numbers 18:25 - 18:32
25 Then Yahweh spoke to Moses, saying, 26 “Moreover, you shall speak to the Levites and say to them, ‘When you take from the sons of Israel the tithe which I have given you from them for your inheritance, then you shall raise up a contribution offering from it to Yahweh, a tithe of the tithe. 27 And your contribution offering shall be reckoned to you as the grain from the threshing floor or the full produce from the wine vat. 28 So you shall also raise up a contribution offering to Yahweh from all your tithes, which you receive from the sons of Israel; and from it you shall give the contribution offering of Yahweh to Aaron the priest. 29 Out of all your gifts you shall raise up every contribution offering due to Yahweh, from all the best of them, the sacred part from them.’ 30 And you shall say to them, ‘When you have raised up from it the best of it, then the rest shall be accounted to the Levites as the product of the threshing floor and as the product of the wine vat. 31 And you may eat it anywhere, you and your households, for it is your compensation in return for your service in the tent of meeting. 32 And you will bear no sin by reason of it when you have raised up the best of it. But you shall not profane the sacred gifts of the sons of Israel, so that you will not die.’”