Dhammapada · 5.8

Carantaṃ apare bāle, mittabhāvena saṃyutaṃ;Na so muñcati dukkhasmā, ahivisaṃva añjasaṃ.

Carantam apare bale, mittabhavena samyutam; Na so muncati dukkhasma, ahivisamva anjasam.

One who walks with fools, bound by friendship — they are not freed from suffering, as poison spreads through an ointment.

— Dhammapada 5.8

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.