[1863] "Does the Arahant (arahā) attain final Nibbāna (parinibbāyati) established in imperturbability (āneñja)?"
"Yes."
"Does the Arahant attain final Nibbāna established in a functional-indeterminate (kiriyābyākata) mind (citta)?"
"It should not be said thus." …
"But is it not that the Arahant attains final Nibbāna established in a resultant-indeterminate (vipākābyākata) mind?"
"Yes."
"If the Arahant attains final Nibbāna established in a resultant-indeterminate mind, then indeed it should not be said: 'The Arahant attains final Nibbāna established in imperturbability.'"
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.