瑜伽論記 13.165

13.165

義曰：非王無力不與能熏相應，而非所熏，以無力能，不從加行心之所引生，故非能熏。夫能熏者，必從前加行心引生者，可成能熏。故此五法非是能熏。若爾六識之中，異熟捨受，應同此類非能所熏。

The explanation says: It is not the sovereign [consciousness], so it lacks power and is not conjoined with what can perfume; yet it is not what is perfumed, because lacking power and capacity, it is not brought about and generated from an intentional mind (prayoga-citta), and therefore is not what can perfume. Generally, that which can perfume must be brought about and generated from a preceding intentional mind to qualify as a perfumer. Hence these five mental factors are not what can perfume. If so, then among the six consciousnesses, the ripening neutral feeling should belong to this category and neither be what can perfume nor what is perfumed.