俱舍論記 16.42

16.42

「語惡業道至後起及輕」者，語惡業道，於語惡行不攝加行、後起，及輪王、北洲、染心歌等。綺語是輕，身三業道損他是重。輪王、北洲一向不起，故身業等不說輕也。或飲酒等即是身輕。或行誑等闕緣不成，亦名語輕。以加行等非麁顯故，不名業道。若語惡麁顯易知，方名業道。

[On the text,] "The vocal bad paths of karma [...] subsequent and light": Vocal bad paths of karma do not subsume, under vocal bad conduct, preparatory actions, subsequent actions, singing with a defiled mind under a wheel-turning king or in the northern continent, and the like. Frivolous talk is light; the three bodily paths of karma harm others and are heavy. In the northern continent and under a wheel-turning king, [the heavy ones] are never produced at all, so bodily actions and the like are not said to be light. Alternatively, drinking alcohol and the like are light bodily actions; or engaging in deception and the like that fail to be accomplished due to a lack of conditions are also called light vocal actions. Because preparatory actions and the like are not coarse and manifest, they are not named paths of karma. Only when vocal badness is coarse, manifest, and easily known is it named a path of karma.