מֵ֭רַע מַקְשִׁ֣יב עַל־שְׂפַת־אָ֑וֶן שֶׁ֥קֶר מֵ֝זִין עַל־לְשׁ֥וֹן הַוֺּֽת׃
A evil-doer giveth heed to wicked lips; And a liar giveth ear to a mischievous tongue.
Read Jewish philosophical commentary on Proverbs 17:4: and classical philosophical sources.