Dhammapada · 12.7

Sukarāni asādhūni, attano ahitāni ca;Yaṃ ve hitañca sādhuñca, taṃ ve paramadukkaraṃ.

Sukarani asadhuni, attano ahitani ca; Yam ve hitanca sadhunca, tam ve paramadukkaram.

Easy to do are things that are unwholesome and harmful to oneself. What is beneficial and good — that is extremely hard to do.

— Dhammapada 12.7

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.