[658] The form base (rūpāyatana) is form (rūpa) cognizable by the eye. The sound base (saddāyatana) is form cognizable by the ear. The odour base (gandhāyatana) is form cognizable by the nose. The taste base (rasāyatana) is form cognizable by the tongue. The tangible base (phoṭṭhabbāyatana) is form cognizable by the body. The form base, the sound base, the odour base, the taste base, and the tangible base are form cognizable by the mind element (manodhātu). All form is form cognizable by the mind-consciousness element (manoviññāṇadhātu).
Thus is the sevenfold classification of form (rūpasaṅgaha).
The Heptad (sattaka).
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.