大乘百法明門論開宗義決 1.77

1.77

若自在位乃至隨根無相濫失等者。謂若隨境立六識名。至自在位五根互用。眼根發識遍緣五塵為名觸識。乃至鼻根發識緣境遍於五塵。是則五識皆名五識。有雜亂過。若其隨根即無此過。縱其眼根能發之識緣一切境。但可隨根名為眼識。即無雜亂。

Regarding 'If in the stage of mastery, down to: according with the faculty lacks the error of confusion', and so forth: if names for the six consciousnesses were established according to their objects, then upon reaching the stage of mastery where the five faculties function interchangeably, when the eye faculty generates a consciousness that universally takes the five dusts [sense objects] as its object, it would be named a tangible consciousness; and so on, down to the nose faculty generating a consciousness whose object of perception universally encompasses the five dusts. In that case, each of the five consciousnesses would be named all five consciousnesses, resulting in the fault of confusion. If they are named according to the faculty, there is no such fault: even if the consciousness generated by the eye faculty takes all objects as its domain, it may solely be named the eye consciousness according to the faculty, so there is no confusion.