Padhānasutta
“Cattārimāni, bhikkhave, padhānāni. Katamāni cattāri? Saṁvarappadhānaṁ, pahānappadhānaṁ, bhāvanāppadhānaṁ, anurakkhaṇāppadhānaṁ. Katamañca, bhikkhave, saṁvarappadhānaṁ? Idha, bhikkhave, bhikkhu anuppannānaṁ pāpakānaṁ akusalānaṁ dhammānaṁ anuppādāya chandaṁ janeti vāyamati vīriyaṁ ārabhati cittaṁ paggaṇhāti padahati. Idaṁ vuccati, bhikkhave, saṁvarappadhānaṁ.
Effort
“Mendicants, there are these four efforts. What four? The efforts to restrain, to give up, to develop, and to preserve. And what, mendicants, is the effort to restrain? It’s when you generate enthusiasm, try, make an effort, exert the mind, and strive so that bad, unskillful qualities don’t arise. This is called the effort to restrain.