Saṃyutta Nikāya 36 3. Aṭṭhasatapariyāyavagga 30. Suddhikasutta “Tisso imā, bhikkhave, vedanā. Katamā tisso? Sukhā vedanā, dukkhā vedanā, adukkhamasukhā vedanā—imā kho, bhikkhave, tisso vedanā”ti. Dasamaṃ.