成唯識論述記 7.190

7.190

The Commentary states: The four great elements, space, and consciousness are capable of constituting a sentient being, but it does not say that mental factors constitute a sentient being. The fifty-sixth fascicle says that this is spoken with intentional meaning, because matter, motion, and mental factors are the supreme bases of these three dharmas, which is why only six are spoken of. It is spoken in sūtras everywhere, common to both Mahāyāna and Hīnayāna.