Appamatto pamattesu, suttesu bahujāgaro;
Abalassaṃva sīghasso, hitvā yāti sumedhaso.
The wise sage is diligent among the negligent. He is awake and meditates when others sleep. He advances like a swift horse leaving the weak one behind.
Dhammapada 29
Read all the verses in the chapter Diligence on SuttaFriends.org in Pali and English.