Dhammapada · 9.10

Yo appaduṭṭhassa narassa dussati, suddhassa posassa anaṅgaṇassa;Tameva bālaṃ pacceti pāpaṃ, sukhumo rajo paṭivātaṃva khitto.

Yo appadutthassa narassa dussati, suddhassa posassa ananganassa; Tameva balam pacceti papam, sukhumo rajo pativatamva khitto.

Whoever offends a person who has not offended, who is pure and without blemish — evil returns to that fool like fine dust thrown against the wind.

— Dhammapada 9.10

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.