[29] What, on that occasion, is the mindfulness faculty (satindriya)?
That which on that occasion is mindfulness (sati), recollection (anussati), remembrance (paṭissati), mindfulness, the act of remembering (saraṇatā), the state of bearing in mind (dhāraṇatā), the state of not floating away (apilāpanatā), the state of not forgetting (asammusanatā), mindfulness, the mindfulness faculty, the mindfulness power (satibala), right mindfulness (sammāsati) — this, on that occasion, is the mindfulness faculty.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.