The Exterior as Impermanent Bāhirāyatanaaniccasutta

“Mendicants, sights, sounds, smells, tastes, touches, and ideas are impermanent. “Rūpā, bhikkhave, aniccā. Saddā … gandhā … rasā … phoṭṭhabbā … dhammā aniccā.

Seeing this … Evaṁ passaṁ …pe… They understand: ‘… there is nothing further for this place.’” nāparaṁ itthattāyāti pajānātī”ti.