Ephesians 4
³¹Get rid of all bitterness, rage and anger, brawling and slander, along with every form of malice. ³²Be kind and compassionate to one another, forgiving each other, just as in Christ God forgave you.

Matthew 5
²³"Therefore, if you are offering your gift at the altar and there remember that your brother has something against you,

Romans 12
¹⁷Do not repay anyone evil for evil. Be careful to do what is right in the eyes of everybody.

1 Peter 2
²¹To this you were called, because Christ suffered for you, leaving you an example, that you should follow in his steps.  ²²"He committed no sin, and no deceit was found in his mouth." ²³When they hurled their insults at him, he did not retaliate; when he suffered, he made no threats. Instead, he entrusted himself to him who judges justly.

Hebrews 12
Warning Against Refusing God
¹⁴Make every effort to live in peace with all men and to be holy; without holiness no one will see the Lord. ¹⁵See to it that no one misses the grace of God and that no bitter root grows up to cause trouble and defile many.

James 3
¹⁰Out of the same mouth come praise and cursing. My brothers, this should not be. ¹¹Can both fresh water and salt water flow from the same spring? ¹²My brothers, can a fig tree bear olives, or a grapevine bear figs? Neither can a salt spring produce fresh water.

Two Kinds of Wisdom
¹³Who is wise and understanding among you? Let him show it by his good life, by deeds done in the humility that comes from wisdom. ¹⁴But if you harbor bitter envy and selfish ambition in your hearts, do not boast about it or deny the truth. ¹⁵Such "wisdom" does not come down from heaven but is earthly, unspiritual, of the devil.