瑜伽師地論略纂 14.73

14.73

論云「何故不苦不樂望彼無明說互相對」等者，謂由與諸受為助伴是捨受，一切煩惱為助伴是無明，受於受為助伴，煩惱於煩惱為助伴故，故互相對。又受與無明皆能為受、煩惱為助伴，故二相對說。以此文證第四禪中，捨受映正知支，不立為支也。

The treatise says: "Why is neither-painful-nor-pleasant feeling stated to be mutually contrasted with ignorance?" and so forth. This means that equanimous feeling is the companion to all feelings, and ignorance is the companion to all afflictions; feeling serves as companion to feeling, and affliction serves as companion to affliction, and thus they are mutually contrasted. Furthermore, feeling and ignorance can both serve as companions to feelings and afflictions, and therefore the two are stated in mutual contrast. By this passage it is proven that in the fourth dhyāna, equanimous feeling overshadows the factor of correct discernment, and so [the latter] is not established as a separate factor.