מַעְיָ֣ן נִ֭רְפָּשׂ וּמָק֣וֹר מָשְׁחָ֑ת צַ֝דִּ֗יק מָ֣ט לִפְנֵֽי־רָשָֽׁע׃
אַ קױטיקער קװאַל, און אַ דומפּיקער ברונעםאיז אַ צדיק װאָס בײגט זיך פֿאַרן רָשע.
Rashi
A righteous man slipping before a wicked man When a righteous man slips before a wicked man and is afraid to reprove him for his way to his face, the matter is hateful like a muddied spring and a ruined fountain.