Dhammapada · 25.1

Cakkhunā saṃvaro sādhu, sādhu sotena saṃvaro;Ghānena saṃvaro sādhu, sādhu jivhāya saṃvaro.

Cakkhuna samvaro sadhu, sadhu sotena samvaro; Ghanena samvaro sadhu, sadhu jivhaya samvaro.

Good is restraint of the eye; good is restraint of the ear; good is restraint of the nose; good is restraint of the tongue. Each sense-door rightly guarded is itself a small liberation.

— Dhammapada 25.1

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.