[613] Which is that form (rūpa) that is external and not the eye element (cakkhudhātu)?
The form base (rūpāyatana) … edible food (kabaḷiṅkāra āhāra) — this is that form that is external and not the eye element.
Which is that form that is internal and is the eye element?
The eye base (cakkhāyatana) — this is that form that is internal and is the eye element.
Which is that form that is internal and not the eye element?
The ear base (sotāyatana) … the body base (kāyāyatana) — this is that form that is internal and not the eye element.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.