[960] Here, bhikkhus, while a bhikkhu dwells heedful, ardent, and resolute, there arises the faculty of joy (somanassindriya). He understands thus: 'This faculty of joy has arisen in me; and that has a sign (nimitta), a source, a formation, a condition. That a faculty of joy could arise without a sign, without a source, without a formation, without a condition — this is impossible.' He understands the faculty of joy, he understands the origin of the faculty of joy, he understands the cessation of the faculty of joy, and he understands where the arisen faculty of joy ceases without remainder. And where does the arisen faculty of joy cease without remainder? Here, bhikkhus, with the abandoning of pleasure and the abandoning of pain, 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 includes purification of mindfulness by equanimity. It is here that the arisen faculty of joy ceases without remainder. This, bhikkhus, is called a bhikkhu who has understood the cessation of the faculty of joy; he directs his mind (citta) to that state.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.