Dhamma Verses (Dhammapada, KN 2)

18: The Chapter about Stains – 227
Seeing one’s own faults
The merchant Meṇḍaka wanted to see the Buddha when he
was passing through, but the outside ascetics tried to persuade
him not to by telling him falsely that he teaches there is no
result of actions; Meṇḍaka went anyway and the Buddha
taught him with this verse.
252. Sudassaṁ vajjam-aññesaṁ, attano pana duddasaṁ,
paresaṁ hi so vajjāni opuṇāti yathā bhusaṁ,
attano pana chādeti, kaliṁ va kitavā saṭho.
Easy to see are others’ faults,
but one’s own fault is hard to see,
for one sifts other peoples’ faults
like chaff, but conceals one’s own faults,
like a cheat conceals his defeat.