[510] Classification of form (rūpa-saṅgaha) by way of eight:
Form (rūpa) cognizable by the eye; form cognizable by the ear; form cognizable by the nose; form cognizable by the tongue; form cognizable by the body — there is that with pleasant contact, there is that with painful contact; form cognizable by the mind element (mano-dhātu); form cognizable by the mind-consciousness element (mano-viññāṇa-dhātu). Thus is the classification of form by way of eight.
The Octad.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.