Numbers 18:12

All the best of the oil, and all the best of the wine, and of
the wheat
Or the "fat" ^F9 of them; the fat of anything being the best, see ( Deuteronomy 32:14 ) ; the firstfruits of them:
the oil, and wine, and wheat: which they shall offer unto the Lord, them have I given thee;
this Jarchi calls the great heave offering, the firstfruits of their harvest and vintage, which being offered to the Lord, was given to the priests: the quantity is not fixed, but left to the generosity of the people, and was a free gift; liberal men would give a fortieth part, those of a meaner spirit a fiftieth, and niggardly ones a sixtieth, and less than that was not given (See Gill on Exodus 22:29); compare with this ( Ezekiel 45:13 ) .