Dhammapada · 8.4
Yo sahassaṃ sahassena, saṅgāme mānuse jine;Ekañca jeyyamattānaṃ, sa ve saṅgāmajuttamo.
Yo sahassam sahassena, sangame manuse jine; Ekanca jeyyamattanam, sa ve sangamajuttamo.
Though one may conquer a million men in battle, the supreme conqueror is one who conquers himself.
— Dhammapada 8.4
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.