Numbers 18:30

Therefore you shall say to them, ‘When you have offered from it the best of it, then the rest shall be counted to the Levites as produce of the threshing floor, and as produce of the winepress.

“Say to the Levites: ‘When you present the best part, it will be reckoned to you as the product of the threshing floor or the winepress.

“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,

“Also, give these instructions to the Levites: When you present the best part as your offering, it will be considered as though it came from your own threshing floor or winepress.

You will say to them, ‘When you are presenting its fat, the rest will be credited to the Levites like a yield of the threshing floor and like a yield from the press.

Therefore thou shalt say unto them, When ye have heaved the best thereof from it, then it shall be counted unto the Levites as the increase of the threshingfloor, and as the increase of the winepress.