Passage
Digha Nikaya 10 (dn10:2.17.1)
pli dn
Puna caparaṁ, māṇava, bhikkhu pītiyā ca virāgā upekkhako ca viharati sato sampajāno, sukhañca kāyena paṭisaṁvedeti, yaṁ taṁ ariyā ācikkhanti: ‘upekkhako satimā sukhavihārī’ti, tatiyaṁ jhānaṁ upasampajja viharati.