The Exterior as Suffering Bāhirāyatanadukkhasutta

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

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