23 Have nothing to do with foolish, ignorant controversies; you know that they breed quarrels.24 And the Lord's servant must not be quarrelsome but kind to everyone, able to teach, patiently enduring evil,
Ecclesiastes 7
9 Be not quick in your spirit to become angry, for anger lodges in the bosom of fools.
Genesis 4
4 and Abel also brought of the firstborn of his flock and of their fat portions. And the LORD had regard for Abel and his offering,5 but for Cain and his offering he had no regard. So Cain was very angry, and his face fell.6 The LORD said to Cain, “Why are you angry, and why has your face fallen?7 If you do well, will you not be accepted? And if you do not do well, sin is crouching at the door. Its desire is for you, but you must rule over it.”8 Cain spoke to Abel his brother. And when they were in the field, Cain rose up against his brother Abel and killed him.9 Then the LORD said to Cain, “Where is Abel your brother?” He said, “I do not know; am I my brother's keeper?”
Matthew 5
22 But I say to you that everyone who is angry with his brother will be liable to judgment; whoever insults his brother will be liable to the council; and whoever says, ‘You fool!’ will be liable to the hell of fire.23 So if you are offering your gift at the altar and there remember that your brother has something against you,24 leave your gift there before the altar and go. First be reconciled to your brother, and then come and offer your gift.
Proverbs 15
18 A hot-tempered man stirs up strife, but he who is slow to anger quiets contention.
Proverbs 20
3 It is an honor for a man to keep aloof from strife, but every fool will be quarreling.
Proverbs 29
22 A man of wrath stirs up strife, and one given to anger causes much transgression.
Psalm 51
5 Behold, I was brought forth in iniquity, and in sin did my mother conceive me.
