釋禪波羅蜜次第法門 2.133

2.133

復次，行者為修禪故，持戒清淨，棄捨五蓋，初夜、後夜專精不廢，譬如鑽火未然，終不休息，是名精進。如佛告阿難：「諸佛一心勤精進，故得三菩提。」何況餘善道法？

Furthermore, for the sake of cultivating dhyāna, the practitioner maintains pure precepts, abandons the five hindrances, and throughout the initial and final watches of the night focuses with diligence without lapse—just like drilling for fire, which is never rested before it ignites; this is called vigor. As the Buddha told Ānanda: 'Because all Buddhas diligently practice vigor with single-mindedness, they attain sambodhi.' How much more so for the other wholesome paths and dharmas?