瑜伽論記 16.342

16.342

若受用時，建立觸食等者，初得段食，口中咀嚼，乃至入腹未墮熟藏，未名段食，但發諸識相應觸數，建立觸食，是故段食三處所攝不立色處等，以含嚼無用，至於變壞位香等有力能損益故。

Regarding 'if at the time of enjoyment, establishing contact-food, and so forth': when morsel food is first obtained, chewed in the mouth, and even enters the belly but has not yet fallen into the stomach, it is not yet called morsel food; it merely generates the mental factor of contact associated with the various consciousnesses, thus establishing contact-food. For this reason, morsel food is subsumed under three sensory fields and does not establish visible form, etc., because holding it in the mouth and chewing it has no [sustaining] efficacy; only when it reaches the stage of alteration and digestion do odor, etc., possess efficacy to harm or benefit.