Matthew 5:22 But I tell you that anyone who is angry with his brother will be subject to judgment. Again, anyone who says to his brother, ‘Raca,’ is answerable to the Sanhedrin. But anyone who says, ‘You fool!’ will be in danger of the fire of hell.
1 Cor. 13:5 [Love] is not rude, it is not self-seeking, it is not easily angered, it keeps no record of wrongs.
2 Cor. 12:20 For I am afraid that when I come I may not find you as I want you to be, and you may not find me as you want me to be. I fear that there may be quarreling, jealousy, outbursts of anger, factions, slander, gossip, arrogance and disorder.
Ephes. 4:26 “In your anger do not sin”: Do not let the sun go down while you are still angry,
Ephes. 4:31 Get rid of all bitterness, rage and anger, brawling and slander, along with every form of malice.
Col. 3:8 But now you must rid yourselves of all such things as these: anger, rage, malice, slander, and filthy language from your lips.
1 Tim. 2:8 I want men everywhere to lift up holy hands in prayer, without anger or disputing.
James 1:19-20 My dear brothers, take note of this: Everyone should be quick to listen, slow to speak and slow to become angry,  for man’s anger does not bring about the righteous life that God desires.
A gentle answer turns away wrath,
but a harsh word stirs up anger.
Do not make friends with a hot-tempered man,
do not associate with one easily angered,
Anger is cruel and fury overwhelming,
but who can stand before jealousy?
Mockers stir up a city,
but wise men turn away anger.
A fool gives full vent to his anger,
but a wise man keeps himself under control.
An angry man stirs up dissension,
and a hot-tempered one commits many sins.
For as churning the milk produces butter,
and as twisting the nose produces blood,
so stirring up anger produces strife.”