Dhammapada · 18.18

Sudassaṃ vajjamaññesaṃ, attano pana duddasaṃ;Paresaṃ hi so vajjāni, opunāti yathā bhusaṃ;Attano pana chādeti, kaliṃva kitavā saṭho.

Sudassam vajjamannesam, attano pana duddasam; Paresam hi so vajjani, opunati yatha bhusam; Attano pana chadeti, kalimva kitava satho.

Easy to see are the faults of others, but one's own are hard to see. One winnows others' faults like chaff, but conceals one's own — as a crafty gambler hides a losing throw.

— Dhammapada 18.18

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.