מְק֣וֹר חַ֭יִּים פִּ֣י צַדִּ֑יק וּפִ֥י רְ֝שָׁעִ֗ים יְכַסֶּ֥ה חָמָֽס׃
The mouth of the righteous is a fountain of life; but the mouth of the wicked concealeth violence.
Read halakhic rulings (Jewish law) on Proverbs 10:11: and classical halakhic sources.