Proverbs 10:31 in the King James Version
The mouth of the just bringeth forth wisdom: but the froward tongue shall be cut out.
Context
30 The righteous will never be removed, but the wicked will not dwell in the land.
31 The mouth of the righteous produces wisdom, but the perverse tongue will be cut off.
32 The lips of the righteous know what is acceptable, but the mouth of the wicked is perverse.