Numbers 18:30-32

30“Tell them further: Once you have presented the best part of the tenth, and it is credited to you Levites as the produce of the threshing floor or the winepress,

31then you and your household may eat it anywhere. It is your wage in return for your work at the tent of meeting.

32You will not incur guilt because of it once you have presented the best part of it, but you must not defile the Israelites’ holy offerings, so that you will not die.”