俱舍論疏 10.184

10.184

論「此不能益至境各別故」，答也。聞香等時能益自根，見色時不能益眼，故非是食。先益自根，後及餘身，可名為食。當不能益自根、大種，況能及餘。言「解脫故」者，謂已離欲者。

The Śāstra says: "This cannot nourish ... because the objects are distinct." An answer. When smelling odors and so forth, they can nourish their own faculties; when seeing visible form, it cannot nourish the eyes; hence it is not food. One can be called food if it first nourishes its own faculty and later reaches the rest of the body. When it cannot nourish its own faculty and primary elements, how much less can it reach the rest! The phrase "because of liberation" refers to those who are already free from desire.