相応部（サンユッタ・ニカーヤ） 2:7
SUJATOKatamā ca sā, bhikkhave, majjhimā paṭipadā tathāgatena abhisambuddhā cakkhukaraṇī ñāṇakaraṇī upasamāya abhiññāya sambodhāya nibbānāya saṁvattati?
And what is that middle way of practice?
Katamā ca sā, bhikkhave, majjhimā paṭipadā tathāgatena abhisambuddhā cakkhukaraṇī ñāṇakaraṇī upasamāya abhiññāya sambodhāya nibbānāya saṁvattati?
And what is that middle way of practice?