Numbers 18:13

i.e. Not only the first-fruits of the oil, and wine, and wheat now mentioned, but all other first-fruits of all other grains, and all fruit-trees, &c. Every one that is clean; and none else, because these were first offered to God, and by consequent given to the priests; but for those which were directly and immediately given to the priests, the clean and unclean might eat of them.