Yaṃ ajjhattaṃ paccattaṃ ākāsaṃ ākāsagataṃ upādiṇṇaṃ, seyyathīdaṃ: kaṇṇacchiddam nāsacchiddam mukhadvāraṃ, yena ca asitāpītakhāyitasāyitaṃ ajjhoharati, yattha ca asitapītakhāyitasāyitaṃ santiṭṭhati, yena ca asitapītakhāyitasāyitaṃ adhobhāgā nikkhamati; yaṃ vā pan' aññam pi kiñci ajjhattaṃ paccattaṃ ākāsaṃ ākāsagataṃ upādiṇṇaṃ;-- ayaṃ vuccati bhikkhu, ajjhattikā ākāsadhātu.