Proverbs 10:31 in the World English Bible
The mouth of the righteous produces wisdom, but the perverse tongue will be cut off.
Context
30 The righteous shall never be removed: but the wicked shall not inhabit the earth.
31 The mouth of the just bringeth forth wisdom: but the froward tongue shall be cut out.
32 The lips of the righteous know what is acceptable: but the mouth of the wicked speaketh frowardness.