[626] Therein, what are the six kinds of happiness (somanassa) based on renunciation (nekkhamma)? When one has known the impermanence of forms (rūpa) — their change, fading away, and cessation — for one who sees with right wisdom, as it really is, thus: 'Forms both formerly and now — all those forms are impermanent, suffering (dukkha), and subject to change,' happiness arises. Such happiness as this is called happiness based on renunciation.
When one has known the impermanence of sounds … odors … tastes … tangibles (phoṭṭhabba) … When one has known the impermanence of mental objects (dhammā) — their change, fading away, and cessation — for one who sees with right wisdom, as it really is, thus: 'Mental objects both formerly and now — all those mental objects are impermanent, suffering, and subject to change,' happiness arises. Such happiness as this is called happiness based on renunciation. These are the six kinds of happiness based on renunciation.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.