Dhammapada · 26.14

Na cāhaṃ brāhmaṇaṃ brūmi, yonijaṃ mattisambhavaṃ;Bhovādī nāma so hoti, sace hoti sakiñcano;Akiñcanaṃ anādānaṃ, tamahaṃ brūmi brāhmaṇaṃ.

Na caham brahmanam brumi, yonijam mattisambhavam; Bhovadi nama so hoti, sace hoti sakincano; Akincanam anadanam, tamaham brumi brahmanam.

I do not call one a brahmin merely because he is born from a brahmin mother or from a brahmin womb. If he is still owned by attachments, he is merely the 'sir-sayer.' The one who has nothing and grasps at nothing — him I call a brahmin.

— Dhammapada 26.14

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.