Matthew 5:22
But I say to you, Whoever is angry with his brother without a cause, shall be liable to the sentence of the judges. And whoever shall say to his brother, Worthless fellow, shall be liable to the sentence of the Sanhedrin. But who ever shall say, Impious wretch, shall be in danger of hell-fire.
Ephesians 4:31
Let all bitterness and anger and wrath and clamor and impious speaking be put away from you, with all malice:
Ephesians 6:4
And you fathers, do not provoke your children to anger: but bring them up in the instruction and discipline of the Lord.
James 1:19-20
So, then, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath.