Romans 12:14
Bless your persecutors--bless and never curse.
Matthew 5:22
I, however, say to you that any one who cherishes anger against his brother shall be liable to answer for it to the Court; and whoever pours contempt upon his brother shall be liable to answer for it to the High Council, while whoever calls down curses upon him shall be liable to answer for it in the fiery Pit.
Matthew 5:43-44
You have heard that it was said--'Thou shalt love thy neighbor and hate thy enemy.'
Matthew 12:36
I tell you that for every careless thing that men say, they must answer on the 'Day of Judgment.'
James 3:6
And the tongue is like a spark. Among the members of our body it proves itself a very world of mischief; it contaminates the whole body; it sets the wheels of life on fire, and is itself set on fire by the flames of the Pit.
James 3:9-10
With it we bless our Lord and Father, and with it we curse men who are made 'in God's likeness.'
1 Peter 2:22-23
He 'never sinned, nor was anything deceitful ever heard from his lips.'
1 Peter 3:9
never returning evil for evil, or abuse for abuse, but, on the contrary, blessing. It was to this that you were called--to obtain a blessing!