Saṃyutta Nikāya 22 4. Natumhākavagga 41. Tatiyaanudhammasutta Sāvatthinidānaṃ. “Dhammānudhammappaṭipannassa, bhikkhave, bhikkhuno ayamanudhammo hoti yaṃ rūpe dukkhānupassī vihareyya … pe … parimuccati dukkhasmāti vadāmī”ti. Navamaṃ.