• Proverbs 26:23-28
  Fervent lips with a wicked heart
  Are like earthenware covered with silver dross.
  He who hates, disguises it with his lips,
  And lays up deceit within himself;
  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.
  Whoever digs a pit will fall into it,
  And he who rolls a stone will have it roll back on him.
  A lying tongue hates those who are crushed by it,
  And a flattering mouth works ruin.
   

Related Scriptures

• Psalm 15:1-5
  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;
  In whose eyes a vile person is despised,
  But he honors those who fear the LORD;
  He who swears to his own hurt and does not change;
  He who does not put out his money at usury,
  Nor does he take a bribe against the innocent. He who does these things shall never be moved.
  
   
• Jeremiah 17:9
  " The heart is deceitful above all things,
  And desperately wicked;
  Who can know it?
  
   
• Proverbs 11:9
  The hypocrite with his mouth destroys his neighbor,
  But through knowledge the righteous will be delivered.
  
   
• Matthew 7:16
  You will know them by their fruits. Do men gather grapes from thornbushes or figs from thistles?
   
• John 1:47
  Jesus saw Nathanael coming toward Him, and said of him, "Behold, an Israelite indeed, in whom is no deceit!"
   
• Ephesians 4:29
  Let no corrupt word proceed out of your mouth, but what is good for necessary edification, that it may impart grace to the hearers.
   
• Romans 1:18
  For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who suppress the truth in unrighteousness,