瑜伽師地論略纂 4.33

4.33

「順不苦不樂受業中，別報唯第四靜慮已上業」者，此有二義。一云：三定已下有別報受果。此及《對法》不說有業者，據多分善業感樂受果，少分善業感捨受果，故略不論。不爾，何故下地善業不得彼果？二云：三定已下無別善捨業，第六識中捨果寂靜，下業麁故，善但招樂，故無捨果。　問：下善業麁，不招捨果；第八捨果，下業不招。答：總別異故，不應為例。

Regarding “Among karma according with neither-painful-nor-pleasant feeling, particular retribution is solely karma of the fourth dhyāna and above”: There are two explanations here. The first says: below the third dhyāna there is particular retribution fruit experienced. That this text and the Abhidharma-samuccaya do not speak of such karma is because the majority of wholesome karma incurs pleasant feeling as fruit, and only a minority of wholesome karma incurs neutral feeling as fruit; hence it is omitted in brief. If not so, why would wholesome karma of lower realms not obtain that fruit? The second says: below the third dhyāna there is no separate wholesome karma of neutral feeling; in the sixth consciousness the neutral fruit is tranquil, and since lower karma is coarse, wholesome karma only incurs pleasure, hence there is no neutral fruit. Question: If lower wholesome karma is coarse and does not incur a neutral fruit, why does lower karma incur the neutral fruit of the eighth consciousness? Answer: Because overall and particular retribution differ, this should not be made a parallel.