(Aṅguttaranikāya - Catukkanipāta - Rohitassavaggo) Pañhabyākaraṇasuttaṃ ‘‘Cattārimāni , bhikkhave, pañhabyākaraṇāni. Katamāni cattāri? Atthi, bhikkhave, pañho ekaṃsabyākaraṇīyo.Atthi, bhikkhave, pañho vibhajjabyākaraṇīyo.Atthi, bhikkhave, pañho paṭipucchābyākaraṇīyo.Atthi, bhikkhave, pañho ṭhapanīyo. Imāni kho, bhikkhave, cattāri pañhabyākaraṇānī’’ti. ‘‘Ekaṃsavacanaṃ ekaṃ, vibhajjavacanāparaṃ;Tatiyaṃ paṭipuccheyya, catutthaṃ pana ṭhāpaye.‘‘Yo ca tesaṃ tattha tattha, jānāti anudhammataṃ;Catupañhassa kusalo, āhu bhikkhuṃ tathāvidhaṃ.‘‘Durāsado duppasaho, gambhīro duppadhaṃsiyo;Atho atthe anatthe ca, ubhayassa hoti kovido.‘‘Anatthaṃ parivajjeti, atthaṃ gaṇhāti paṇḍito;Atthābhisamayā dhīro, paṇḍitoti pavuccatī’’ti.