Dhammapada · 14.5

Sabbapāpassa akaraṇaṃ, kusalassa upasampadā;Sacittapariyodapanaṃ, etaṃ buddhāna sāsanaṃ.

Sabbapapassa akaranam, kusalassa upasampada; Sacittapariyodapanam, etam buddhana sasanam.

Not to do any evil, to cultivate the good, to purify one's own mind — this is the teaching of the Buddhas.

— Dhammapada 14.5

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.