Proverbs 12:23
A sharp man keeps back his knowledge; but the heart of foolish men makes clear their foolish thoughts.
Proverbs 13:16
A sharp man does everything with knowledge, but a foolish man makes clear his foolish thoughts.
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.
Proverbs 11:13
He who goes about talking of others makes secrets public, but the true-hearted man keeps things covered.
Proverbs 10:14
Knowledge is stored up by the wise, but the mouth of the foolish man is a destruction which is near.
Proverbs 10:19
Where there is much talk there will be no end to sin, but he who keeps his mouth shut does wisely.
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 10:12-14
The words of a wise man's mouth are sweet to all, but the lips of a foolish man are his destruction.