Numbers 18:30-32

30You must say to the Levites, “After you have made the best part of the gift separate for the priests, the other part will belong to the Levites. That will be the grain and the wine that you receive for your food.

31That is what you receive because you take care of the Tent of Meeting. You and your family may eat it anywhere that you choose.

32You will not be guilty when you eat it. That is because you have offered the best part of it to God. But you must do that in the right way. The gifts that you receive from the Israelites are holy. If you do not do the right things with them, you will die.” ’