Paṭhamasikkhāsutta
“Sādhikamidaṁ, bhikkhave, diyaḍḍhasikkhāpadasataṁ anvaddhamāsaṁ uddesaṁ āgacchati, yattha attakāmā kulaputtā sikkhanti. Tisso imā, bhikkhave, sikkhā yatthetaṁ sabbaṁ samodhānaṁ gacchati. Katamā tisso? Adhisīlasikkhā, adhicittasikkhā adhipaññāsikkhā— imā kho, bhikkhave, tisso sikkhā, yatthetaṁ sabbaṁ samodhānaṁ gacchati.
Training (1st)
“Mendicants, each fortnight over a hundred and fifty training rules come up for recitation, in which gentlemen who desire self-knowledge train. These are all included in the three trainings. What three? The training in the higher ethics, the higher mind, and the higher wisdom. These are the three trainings that include them all.