[644] Setting at Sāvatthī. "Bhikkhus, the perception of a skeleton (aṭṭhikasaññā), when developed and cultivated, leads to great security from bondage (yogakkhema). And how, bhikkhus, is the perception of a skeleton developed, how is it cultivated, so that it leads to great security from bondage? Here, bhikkhus, a bhikkhu develops the mindfulness factor of awakening (bojjhaṅga) accompanied by the perception of a skeleton … he develops the equanimity factor of awakening accompanied by the perception of a skeleton, dependent on seclusion, dependent on dispassion, dependent on cessation, maturing in release. It is when the perception of a skeleton is developed thus, bhikkhus, cultivated thus, that it leads to great security from bondage."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.