瑜伽論記 18.259

18.259

四食體者，段食下文云：當言香味觸處所攝。成唯識云：謂欲界繫香味觸三，此言意顯唯欲界繫香味觸三，於變壞時有資養者，說名為食非餘。

Regarding the entity of the four nutritions: for material food, the text below states that it should be said to be subsumed under the bases of smell, taste, and tangibles. The Cheng weishi lun states: it refers to the three—smell, taste, and tangibles—bound to the desire realm. The intention of these words is to reveal that only the three—smell, taste, and tangibles—bound to the desire realm, when transforming and decaying, possess the capacity to nourish, and are called food, and not anything else.