Dhammapada · 2.11

Appamādarato bhikkhu, pamāde bhayadassi vā;Saṃyojanaṃ aṇuṃ thūlaṃ, ḍahaṃ aggīva gacchati.

appamadarato bhikkhu, pamade bhayadassi va; samyojanam anum thulam, daham aggi-va gacchati.

The monk who delights in heedfulness, who sees danger in heedlessness, moves through every fetter — fine or coarse — as fire moves through fuel.

— Dhammapada 2.11

Source: Pali text from the Khuddaka Nikāya of the Pali Canon (oldest extant Buddhist scripture, compiled c. 3rd century BCE). Public-domain English readings drawn from F. Max Müller's translation in Sacred Books of the East, Vol X (1881) and the Buddhist Publication Society's freely-licensed Acharya Buddharakkhita rendering.