• Proverbs 6:16-19
  These six things the LORD hates,
  Yes, seven are an abomination to Him:
  A proud look,
  A lying tongue,
  Hands that shed innocent blood,
  A heart that devises wicked plans,
  Feet that are swift in running to evil,
  A false witness who speaks lies,
  And one who sows discord among brethren.
   
• Proverbs 26:18-19
  Like a madman who throws firebrands, arrows, and death,
  Is the man who deceives his neighbor,
  And says, “I was only joking!”
  
   
• Deuteronomy 19:15-19
  “One witness shall not rise against a man concerning any iniquity or any sin that he commits; by the mouth of two or three witnesses the matter shall be established. If a false witness rises against any man to testify against him of wrongdoing, then both men in the controversy shall stand before the LORD, before the priests and the judges who serve in those days. And the judges shall make careful inquiry, and indeed, if the witness is a false witness, who has testified falsely against his brother, then you shall do to him as he thought to have done to his brother; so you shall put away the evil from among you.
   
• Proverbs 26:25-26
  When he speaks kindly, do not believe him,
  For there are seven abominations in his heart;
  Though his hatred is covered by deceit,
  His wickedness will be revealed before the assembly.
  
   
• Jeremiah 9:3-6
  “ And like their bow they have bent their tongues for lies.
  They are not valiant for the truth on the earth.
  For they proceed from evil to evil,
  And they do not know Me,” says the LORD.
  “ Everyone take heed to his neighbor,
  And do not trust any brother;
  For every brother will utterly supplant,
  And every neighbor will walk with slanderers.
  Everyone will deceive his neighbor,
  And will not speak the truth;
  They have taught their tongue to speak lies;
  They weary themselves to commit iniquity.
  Your dwelling place is in the midst of deceit;
  Through deceit they refuse to know Me,” says the LORD.
   

Related Scriptures

• Psalm 15:1-3
  LORD, who may abide in Your tabernacle?
  Who may dwell in Your holy hill? He who walks uprightly,
  And works righteousness,
  And speaks the truth in his heart;
  He who does not backbite with his tongue,
  Nor does evil to his neighbor,
  Nor does he take up a reproach against his friend;
  
   
• Proverbs 10:19
  In the multitude of words sin is not lacking,
  But he who restrains his lips is wise.
  
   
• Proverbs 16:28
  A perverse man sows strife,
  And a whisperer separates the best of friends.