1. Dussīla Sutta.– For the wicked who lack virtue, right concentration is perforce destroyed, and this ultimately leads to the destruction of emancipated knowledge and insight, just as a tree devoid of branches and leaves is ultimately destroyed.’ A.iii.19.
4. Dussīla Sutta.– For the immoral person who lacks virtue, the proximate cause of right concentration is lost. One who lacks concentration does not see things as they really are. Then revulsion and dispassion lack their proximate cause. One who lacks revulsion and dispassion the knowledge and vision of freedom lacks its proximate cause. Just as a tree devoid of branches and leaves cannot grow shoots, branches, or heartwood. A.iii.19.