1. Sikkhā Sutta.– One must train oneself in the Dhamma. S.ii.131.
2. Sikkhā Sutta.– The three forms of training in the higher insight. A.i.235.
3. Sikkhā Sutta.– A monk who returns to the lower life must blame himself for five things: having no faith in right things, no conscientiousness, no fear of blame, no energy, no insight into right things. A.iii.4.