成唯識論述記 5.39

5.39

述曰：此下第二，難第六意，令以七、八二識為依。五位無心，第六識斷，此滅定等有無第七，如常徒說。此等五位，唯有七、八二識相續。後出無心時，第七、八識應與第六意識為依；彼先間斷，此恒續故；如在定中耳聞聲等，意雖不同緣，然為耳識依，以意先有故，此耳間生故。五位無心以七、八識同彼定意，以此斷意同彼耳識，故理應爾。

The Commentary states: Below this is the second part, posing an objection regarding the sixth, the mano-vijñāna, to make it take the two vijñānas, the seventh and eighth, as its basis. In the five mindless states, the sixth vijñāna is interrupted; whether there is a seventh in this cessation absorption and so forth is as commonly explained. In these five states, only the two vijñānas, the seventh and eighth, are continuous. When later emerging from the mindless state, the seventh and eighth vijñānas should serve as the basis for the sixth, the mano-vijñāna; because that [sixth] was previously interrupted, while these are constantly continuous. Just as when in meditation the ear hears sound and so forth, although the mind does not cognize the same object, it nevertheless serves as the basis for the ear-consciousness, because the mind previously existed, while this ear[-consciousness] arises intermittently. In the five mindless states, taking the seventh and eighth vijñānas as identical to that meditative mind, and taking this interrupted mind as identical to that ear-consciousness, therefore in principle it must be so.