King James Version (KJV)
If thou hast done foolishly in lifting up thyself, or if thou hast thought evil, lay thine hand upon thy mouth.
Modern English
If you have been foolish, exalting yourself, or if you have been devising evil, put your hand on your mouth.
Hebrew
אִם נָבַ֣לְתָּ בְהִתְנַשֵּׂ֑א וְאִ֥ם זַ֝מּ֗וֹתָ יָ֣ד לְפֶֽה׃
ʾim nabalta bhitnasheʾ vʾim zamvota yad lpeh