James 1:19
19Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath:
Matthew 5:9
9Blessed are the peacemakers: for they shall be called the children of God.
Matthew 26:52
52Then said Jesus unto him, Put up again thy sword into his place: for all they that take the sword shall perish with the sword.
Jeremiah 3:12
12Go and proclaim these words toward the north, and say, Return, thou backsliding Israel, saith the LORD; and I will not cause mine anger to fall upon you: for I am merciful, saith the LORD, and I will not keep anger for ever.
Colossians 3:21
21Fathers, provoke not your children to anger, lest they be discouraged.
Proverbs 21:14
14A gift in secret pacifieth anger: and a reward in the bosom strong wrath.
Proverbs 15:1
1A soft answer turneth away wrath: but grievous words stir up anger.
Ecclesiastes 7:9
9Be not hasty in thy spirit to be angry: for anger resteth in the bosom of fools.
Psalms 37:8
8Cease from anger, and forsake wrath: fret not thyself in any wise to do evil.
Colossians 3:8
8But now ye also put off all these; anger, wrath, malice, blasphemy, filthy communication out of your mouth.
Psalms 103:8
8The LORD is merciful and gracious, slow to anger, and plenteous in mercy.
Proverbs 15:18
18A wrathful man stirreth up strife: but he that is slow to anger appeaseth strife.

(Special thanks to Doctrine Matters Bible Topic Guidebook by Missionary spencer smith.)