"let no corrupt word proceed out of your mouth, but what is good for necessary edification, that it may impart grace to the hearers.

Let all bitterness, wrath, anger, clamor, and evil speaking be put away from you, with all malice.

And be kind to one another, tenderhearted, forgiving one another, even as God in Christ forgave you."

                               Ephesians 4:29, 31-32

"IF somebody does wrong to you, do not pay him back by doing wrong to him.  Try to do what everyone thinks is right.  Do your best to live in peace with everyone.  My friends, do not try to punish others when they wrong you.  Wait for God to punish them with his anger.  It is written: 'I am the One who punishes; I will pay people back," says the Lord. But you should do this: 

If your enemy is hungry, feed him;

if your enemy is thirsty, give him drink.

Doin this will be like pouring burning coals on his head."

Romans 12: 17-20