Dhammapada · 6.8

Sabbattha ve sappurisā cajanti, na kāmakāmā lapayanti santo;Sukhena phuṭṭhā atha vā dukhena, na uccāvacaṃ paṇḍitā dassayanti.

Sabbattha ve sappurisa cajanti, na kamakama lapayanti santo; Sukhena phuttha atha va dukhena, na uccavacam pandita dassayanti.

The good let go in every situation; the peaceful do not babble out of desire. Touched by happiness or by sorrow, the wise show no elation or depression.

— Dhammapada 6.8

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.