Matthew 24:10
Then many will fall by the way, and will betray one another and hate one another.
Acts 23:7-10
When he said that, an angry dispute arose between the Pharisees and the Sadducees, and the crowded court was divided.
Galatians 5:15
But if you continue to bite and eat one another, beware lest you are destroyed by one another.
James 3:14
But if you cherish bitter jealousy and rivalry in your hearts, stop being proud of it and stop being false to the standard of truth.
James 3:16
For wherever jealousy and rivalry exist, there will be confusion and all sorts of evil practices.
James 4:1-3
What causes wars and quarrels among you? Is it not your different desires which are ever at war within your bodies? You desire things and cannot have them, and so you commit murder.