Original Verse:
Proverbs Chapter 17 Verse 20He that hath a froward heart findeth no good: and he that hath a perverse tongue falleth into mischief.

Reference Verses:
James Chapter 3 Verse 8But the tongue can no man tame; it is an unruly evil, full of deadly poison.
Psalms Chapter 101 Verse 5Whoso privily slandereth his neighbour, him will I cut off: him that hath an high look and a proud heart will not I suffer.
Proverbs Chapter 6 Verse 12-15 [12] A naughty person, a wicked man, walketh with a froward mouth. [13] He winketh with his eyes, he speaketh with his feet, he teacheth with his fingers; [14] Frowardness is in his heart, he deviseth mischief continually; he soweth discord. [15] Therefore shall his calamity come suddenly; suddenly shall he be broken without remedy.
Psalms Chapter 18 Verse 26With the pure thou wilt shew thyself pure; and with the froward thou wilt shew thyself froward.
Proverbs Chapter 3 Verse 32For the froward is abomination to the LORD: but his secret is with the righteous.
Proverbs Chapter 8 Verse 13The fear of the LORD is to hate evil: pride, and arrogancy, and the evil way, and the froward mouth, do I hate.
Proverbs Chapter 10 Verse 10He that winketh with the eye causeth sorrow: but a prating fool shall fall.
Proverbs Chapter 10 Verse 14Wise men lay up knowledge: but the mouth of the foolish is near destruction.
Proverbs Chapter 10 Verse 31The mouth of the just bringeth forth wisdom: but the froward tongue shall be cut out.
Proverbs Chapter 18 Verse 6A fool's lips enter into contention, and his mouth calleth for strokes.
Proverbs Chapter 18 Verse 7A fool's mouth is his destruction, and his lips are the snare of his soul.
Ecclesiastes Chapter 10 Verse 12The words of a wise man's mouth are gracious; but the lips of a fool will swallow up himself.