成唯識論述記 3.91

3.91

述曰：心所等者，等彼相分，或六識中異熟生無記。此舉第八異熟心、心所等六識中業所引者，非謂一切異熟生心法執等類皆不能熏，唯業所感異熟心等二種所生，無勝用故，或此法爾皆非能熏，以無用故。

The Commentary states: 'Mental factors and so forth' includes their object-aspects, or the neutral [minds] born of heterogeneous ripening among the six consciousnesses. This adduces those induced by karma among the eighth heterogeneous ripening mind, mental factors, and so forth in the six consciousnesses; it does not mean that all classes of dharma-grasping and so forth in minds born of heterogeneous ripening are incapable of perfuming. Only the two types born of heterogeneous ripening minds and so forth produced by karma lack superior function, or these by their very nature are entirely incapable of perfuming, because they lack function.