Original Verse:
Proverbs Chapter 12 Verse 23A prudent man concealeth knowledge: but the heart of fools proclaimeth foolishness.

Reference Verses:
Proverbs Chapter 15 Verse 2The tongue of the wise useth knowledge aright: but the mouth of fools poureth out foolishness.
Ecclesiastes Chapter 10 Verse 12The words of a wise man's mouth are gracious; but the lips of a fool will swallow up himself.
Proverbs Chapter 13 Verse 16Every prudent man dealeth with knowledge: but a fool layeth open his folly.
Ecclesiastes Chapter 10 Verse 3Yea also, when he that is a fool walketh by the way, his wisdom faileth him, and he saith to every one that he is a fool.
Proverbs Chapter 10 Verse 19In the multitude of words there wanteth not sin: but he that refraineth his lips is wise.
Proverbs Chapter 11 Verse 13A talebearer revealeth secrets: but he that is of a faithful spirit concealeth the matter.