成唯識論述記 7.397

7.397

述曰：第三問答。外人難曰：五俱意唯一，如何取色等多境？此外人難，不許一念意識五識俱生者，分明取五境，非彼不許一心所取多境。又除大眾部等諸識俱者，餘諸識不許並生者，說五識後一念意識，不得一切時緣五種明了境，獨頭者得。雖為此難，令大乘者五俱意識緣五境意亦不明了。

The Commentary states: The third question and answer. The opponent challenges: The manas co-arising with the five is only one; how can it take many cognitive objects, such as form and so forth? This opponent's challenge is made by one who does not allow that in a single thought-moment a mano-vijñāna co-arising with the five vijñānas clearly takes the five cognitive objects; it is not that he disallows a single citta from taking many cognitive objects. Moreover, except for the Mahāsāṃghika and others who [hold that] the various vijñānas co-arise, the other [schools] that do not allow the various vijñānas to arise together say that the single-moment mano-vijñāna following the five vijñānas cannot take five kinds of clear cognitive objects at all times, whereas a solitary [mano-vijñāna] can. Although he makes this objection, he intends to make the Mahāyānist's five-co-arising mano-vijñāna taking the five cognitive objects also be unclear.