אִם־נָבַ֥לְתָּ בְהִתְנַשֵּׂ֑א וְאִם־זַ֝מּ֗וֹתָ יָ֣ד לְפֶֽה׃
If thou hast done foolishly in lifting up thyself, Or if thou hast planned devices, lay thy hand upon thy mouth.
Read halakhic rulings (Jewish law) on Proverbs 30:32: and classical halakhic sources.