俱舍論疏 13.13

13.13

論「毘婆沙師至由上三因」，答。身業從所依，語業是自性，意業是等起。《正理論》云「謂業依身故名身業，業性即語故名語業。此業依意，復與意俱等起身、語，名為意業。」准此論文，意業即是能等起也。

Treatise: "The Vaibhāṣikas […] due to the above three reasons." This is the answer. Bodily karma is named from its basis, vocal karma is named from its own-nature, and mental karma is named from its origin. The Nyāyānusāra says: "Because karma relies on the body, it is called bodily karma; because the nature of the karma is speech itself, it is called vocal karma. This karma relies on the mind, and further, together with the mind, originates body and speech; hence it is called mental karma." According to this passage of the treatise, mental karma is that which originates them.