俱舍論記 16.35

16.35

「三妙行者至無瞋正見」者，釋第四句。此三妙行翻三惡行，業有其三，非業亦三。言妙行者，正感愛果故。智所讚故名妙，動轉捷利故名為行。此行即妙，故名妙行。

Regarding "The three subtle actions... non-malice, and right view": This explains the fourth line. These three subtle actions are the reverse of the three evil actions: there are three that are karma, and three that are non-karma. As for the term "subtle action" [carita/socarita]: because it correctly produces desirable results and is praised by wisdom, it is called "subtle"; because its movement is swift and sharp, it is called "conduct". This conduct is itself subtle, hence called "subtle action".