1 John 3:15
Every one who is hating his brother is a murderer, and you know that no murderer has eternal life abiding in him.
Matthew 18:15
"If your brother sins against you, go and show him, between yourself and him alone. If he listens, you have won your brother.
Ephesians 4:26
"Be angry and sin not"; let not the sun go down upon your anger.
Ephesians 4:31
Banish from among you all bitterness and passion and anger and clamor and slander, as well as all malice;
1 John 2:9
He who says he is in the light, and hates his brother, is in darkness even until now.
1 John 2:11
But he who hates his brother is in the darkness, and is spending his life in the darkness, and does not know where he is going, because the darkness has blinded his eyes.