Proverbs 26:28 Halakhah

לְֽשׁוֹן־שֶׁ֭קֶר יִשְׂנָ֣א דַכָּ֑יו וּפֶ֥ה חָ֝לָ֗ק יַעֲשֶׂ֥ה מִדְחֶֽה׃

A lying tongue hateth those that are crushed by it; And a flattering mouth worketh ruin.

Read halakhic rulings (Jewish law) on Proverbs 26:28: and classical halakhic sources.