Dhammapada · 12.2

Attānameva paṭhamaṃ, patirūpe nivesaye;Athaññamanusāseyya, na kilisseyya paṇḍito.

Attanameva pathamam, patirupe nivesaye; Athannamanusaseyya, na kilisseyya pandito.

First, settle yourself in what is proper. Then instruct another — and the wise will not become defiled.

— Dhammapada 12.2

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.