瑜伽師地論略纂 16.94

16.94

論「香、味、觸正消變，便能長養」等者，此三麁細，有增損義；色塵體麁，不能增損。　若諸段物於吞咽時，令心歡喜等，爾時名觸食者，此取令心歡悅故，即心觸數為觸食體，不取塵為觸食體。

Regarding the treatise's statement, "When odors, tastes, and tangible objects are being digested and transformed, they then are able to nourish," and so forth: these three have gross and subtle aspects and possess the function of increasing or diminishing; the substance of the visual object (rūpa) is gross and cannot increase or diminish [the faculties]. If, when various solid pieces of food are swallowed, they cause the mind to be joyful, and at that time it is called sparśāhāra: this takes the mind's being made joyful, so that the mental factor of contact (sparśa-caitta) itself is the essence of sparśāhāra, and does not take the sensory datum as the essence of sparśāhāra.