Cross reference
Proverbs 17:28
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
5 If only you would keep quiet, it would be a sign of wisdom!
Proverbs 15:2
2 Knowledge is dropping from the tongue of the wise; but from the mouth of the foolish comes a stream of foolish words.
Ecclesiastes 10:14
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?
Ecclesiastes 5:3
3 When you take an oath before God, put it quickly into effect, because he has no pleasure in the foolish; keep the oath you have taken.
Ecclesiastes 10:3
3 And when the foolish man is walking in the way, he has no sense and lets everyone see that he is foolish.