Proverbs 17:20
He who has a wayward heart finds no good, and he who has a perverse tongue falls into mischief.
Psalm 18:26
With the pure thou will show thyself pure. And with the perverse thou will show thyself contrary.
Proverbs 3:32
For the perverse man is an abomination to LORD, but his friendship is with the upright.
Proverbs 6:12-15
A worthless person, a man of iniquity, is he who walks with a perverse mouth,
Proverbs 8:13
The fear of LORD is to hate evil. Pride, and arrogance, and the evil way, and the perverse mouth, do I hate.
Proverbs 10:10
He who winks with the eye causes sorrow. And a prating fool shall fall.
Proverbs 10:14
Wise men lay up knowledge, but the mouth of a foolish man is a present destruction.
Proverbs 10:31
The mouth of a righteous man brings forth wisdom, but the perverse tongue shall be cut off.
Proverbs 18:6-7
A fool's lips enter into contention, and his mouth calls for stripes.
Ecclesiastes 10:12
The words of a wise man's mouth are gracious, but the lips of a fool will swallow himself up.
James 3:6-8
And the tongue is a fire, the world of unrighteousness. Thus, the tongue is made to lead among our body-parts, defiling the whole body, and setting the cycle of nature on fire, and being set on fire by hell.