Dhammapada · 20.6

Sabbe saṅkhārā dukkhāti, yadā paññāya passati;Atha nibbindati dukkhe, esa maggo visuddhiyā.

Sabbe sankhara dukkhati, yada pannaya passati; Atha nibbindati dukkhe, esa maggo visuddhiya.

'All conditioned things are unsatisfactory' — when one sees this with wisdom, then one turns away from suffering. This is the path to purification.

— Dhammapada 20.6

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.