TIPITAKA Volume 17 : PALI ROMAN Sutta Pitaka Vol 9 : Sutta. Saṃ. Kha.

[382] Sāvatthī . ekamantaṃ nisinno kho āyasmā rādho bhagavantaṃ etadavoca dukkhadhammo dukkhadhammoti bhante vuccati katamo nu kho bhante dukkhadhammoti . rūpaṃ kho rādha dukkhadhammo vedanā dukkhadhammo saññā dukkhadhammo saṅkhārā dukkhadhammo viññāṇaṃ dukkhadhammo. Evaṃ passaṃ .pe. Nāparaṃ itthattāyāti pajānātīti.