俱舍論疏 13.70

13.70

On the Śāstra's statement: "If karma relies on the body [... to ...] it should be known that it is also thus": The Sautrāntikas answer. For the Sautrāntikas, the three karmas generally have intention (cetanā) as their substance, which is the same as the Mahāyāna. It is this very mental intention that, relying on the movement of body and speech, is called bodily and vocal karma; when operating solely relying on the mind, it is called mental karma.