Proverbs 12:23
A prudent man conceals knowledge: but the heart of fools proclaims foolishness.
Proverbs 13:16
Every prudent man deals with knowledge: but a fool lays open his folly.
Proverbs 15:2
The tongue of the wise uses knowledge aright: but the mouth of fools pours out foolishness.
Proverbs 11:13
A talebearer reveals secrets: but he that is of a faithful spirit conceals the matter.
Proverbs 10:14
Wise men lay up knowledge: but the mouth of the foolish is near destruction.
Proverbs 10:19
In the multitude of words there lacks not sin: but he that refrains his lips is wise.
Ecclesiastes 10:3
Yea also, when he that is a fool walks by the way, his wisdom fails him, and he says to every one that he is a fool.
Ecclesiastes 10:12-14
The words of a wise man's mouth are gracious; but the lips of a fool will swallow him up.