Charles Ellicott Commentary Proverbs 10:14

"Wise men lay up knowledge; But the mouth of the foolish is a present destruction." — Proverbs 10:14 (ASV)

The mouth of the foolish is near destruction — that is, it is a near, ever-threatening calamity; one never knows what awkward or dangerous thing he will say next: whereas wise men store up knowledge, and bring it forth as it is wanted (Matthew 13:52).