12.2.2 Arūpāvacarakusala

Idha bhikkhu yasmiṃ samaye arūpūpapattiyā maggaṃ bhāveti sabbaso ākiñcaññāyatanaṃ samatikkamma nevasaññānāsaññāyatanasaññāsahagataṃ sukhassa ca pahānā…pe…  catutthaṃ jhānaṃ upasampajja viharati, tasmiṃ samaye duvaṅgikaṃ jhānaṃ hoti—  upekkhā, cittassekaggatā. Idaṃ vuccati “catutthaṃ jhānaṃ”. Avasesā dhammā jhānasampayuttā.