[282] "Furthermore, Poṭṭhapāda, with the abandoning of pleasure and the abandoning of pain (dukkha), and with the previous passing away of joy and grief, a bhikkhu enters and dwells in the fourth jhāna, which is neither-painful-nor-pleasant and possesses purity of mindfulness due to equanimity. His former subtle and true perception (saññā) of pleasure accompanied by equanimity ceases; on that occasion there is a subtle and true perception of what is neither-painful-nor-pleasant; on that occasion he is one percipient precisely of the subtle and true perception of what is neither-painful-nor-pleasant. Thus too, through training (sikkhā), one perception arises; through training, one perception ceases. This too is the training," said the Blessed One.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.