Nevasaññānāsaññāyatanapañhāsutta
“‘Nevasaññānāsaññāyatanaṁ, nevasaññānāsaññāyatanan’ti vuccati. Katamaṁ nu kho nevasaññānāsaññāyatananti? Tassa mayhaṁ, āvuso, etadahosi: ‘idha bhikkhu sabbaso ākiñcaññāyatanaṁ samatikkamma nevasaññānāsaññāyatanaṁ upasampajja viharati. Idaṁ vuccati nevasaññānāsaññāyatanan’ti. So khvāhaṁ, āvuso, sabbaso ākiñcaññāyatanaṁ samatikkamma nevasaññānāsaññāyatanaṁ upasampajja viharāmi. Tassa mayhaṁ, āvuso, iminā vihārena viharato ākiñcaññāyatanasahagatā saññāmanasikārā samudācaranti.
A Question About the Dimension of Neither Perception Nor Non-Perception
“They speak of this thing called the ‘dimension of neither perception nor non-perception’. What is the dimension of neither perception nor non-perception? It occurred to me: ‘It’s when a mendicant, going totally beyond the dimension of nothingness, enters and remains in the dimension of neither perception nor non-perception. This is called the dimension of neither perception nor non-perception.’ And so … I was entering and remaining in the dimension of neither perception nor non-perception. While I was in that meditation, perception and focus accompanied by the dimension of nothingness beset me.