Ephesians 4:26, 27
And “don’t sin by letting anger control you.” Don’t let the sun go down while you are still angry, for anger gives a foothold to the devil.

Proverbs 29:11
Fools vent their anger, but the wise quietly hold it back.

James 1:19, 20
This you know, my beloved brethren. But everyone must be quick to hear, slow to speak and slow to anger for the anger of man does not achieve the righteousness of God.

Proverbs 15:1
A gentle answer deflects anger, but harsh words make tempers flare.