Proverbs 17:28

Even the foolish man, when he keeps quiet, is taken to be wise: when his lips are shut he is credited with good sense.

Job 13:5

If only you would keep quiet, it would be a sign of wisdom!

Proverbs 15:2

Knowledge is dropping from the tongue of the wise; but from the mouth of the foolish comes a stream of foolish words.

Ecclesiastes 5:3

As a dream comes from much business, so the voice of a foolish man comes with words in great number.

Ecclesiastes 10:3

And when the foolish man is walking in the way, he has no sense and lets everyone see that he is foolish.

Ecclesiastes 10:14

The foolish are full of words; man has no knowledge of what will be; and who is able to say what will be after him?

Treasury of Scripture Knowledge did not add

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain