Matthew 24:10
and then will many take offense, and betray one another, and hate one another: and many false prophets will rise up and deceive many:
Acts 23:7-10
Upon his saying this, there rose a contention between the pharisees and the sadducees; and the people were divided.
Galatians 5:15
But if ye bite and devour one another, take heed that ye be not destroyed by one another.
James 3:14
but if ye have bitter envy and strife in your hearts, do not boast and lie against the truth;
James 3:16
for where envying and strife is, there is confusion and every evil work.
James 4:1-3
Whence come wars and fightings among you? Come they not hence? even of your carnal appetites making war in your bodies?