Matthew 5:22
But I say to you, that whoever is angry with his brother shall be in danger of the Judges; and whoever shall say to his brother, Simpleton! shall be in danger of the Council; and whoever shall say, Fool! shall be in danger of hellfire.
Ephesians 4:31
Let all bitterness, and wrath, and anger, and clamor, and evilspeaking, be put away from you, with all malice;
Ephesians 6:4
And, ye fathers, stir not up the anger of your children, but bring them up in the discipline and instruction of the Lord.
James 1:19-20
Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath.