Trường Bộ Kinh (Digha Nikaya) 2:312
SUJATOanuppannānaṁ kusalānaṁ dhammānaṁ uppādāya chandaṁ janeti vāyamati vīriyaṁ ārabhati cittaṁ paggaṇhāti padahati;
They generate enthusiasm, try, make an effort, exert the mind, and strive so that skillful qualities arise.