Dhammapada · 12.10

Attadatthaṃ paratthena, bahunāpi na hāpaye;Attadatthamabhiññāya, sadatthapasuto siyā.

Attadattham paratthena, bahunapi na hapaye; Attadatthamabhinnaya, sadatthapasuto siya.

Let none neglect his own welfare for the welfare of others, however great. Knowing one's own welfare clearly, be intent on it.

— Dhammapada 12.10

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.