Matthew 5:22
but I say to you that he who becomes angry with his brother shall be liable to condemnation by the court; and he who says to his brother 'Raca,' shall be liable to condemnation by the Sanhedrin, while he who curses his brother shall be liable to the Gehenna of Fire.
Ephesians 4:31
Banish from among you all bitterness and passion and anger and clamor and slander, as well as all malice;
Ephesians 6:4
And you fathers, do not irritate your children, but bring them up in the nature and admonition of the Lord.
James 1:19-20
Mark this well, my dear brothers. Let every man be swift in hearing, slow in speaking, slow in growing angry;