俱舍論記 10.166

10.166

「光影炎涼如何成食」者，問。如日光、樹影、火炎、風涼，於此四中香、味、觸三非可飲噉，如何名食？

Regarding 'How do light, shade, heat, and coolness constitute food?': This is the question. For these four—sunlight, tree shade, fire's heat, and wind's coolness—the odor, taste, and tangibles within them cannot be eaten or drunk; how can they be called food?