瑜伽師地論略纂 11.149

11.149

論遂求中，何以唯此八者？謂障三學等故。無慚、愧二，障戒；惛沈、睡眠二，障定或慧；掉舉、惡作二，障慧或定；嫉、慳二，總障三學：故不說餘。或可是八纏，此中未勘。

In the treatise's seeking fulfillment, why are there only these eight? Because they obstruct the three trainings and so forth. Lack of shame and lack of conscience, these two, obstruct morality; torpor and sleepiness, these two, obstruct concentration or prajñā; restlessness and remorse, these two, obstruct prajñā or concentration; jealousy and stinginess, these two, generally obstruct the three trainings: therefore the others are not mentioned. Or perhaps they are the eight entanglements (paryavasthāna); this has not been verified here.