Mark 3:25
"And if a house be divided against itself, that house cannot stand."
Cross References (ranked by relevance)
James 3:16
13
For where envying and strife is, there is confusion and every evil work.
Galatians 5:15
But if ye bite and devour one another, take heed that ye be not consumed one of another.
Psalm 133:1
Behold, how good and how pleasant it is for brethren to dwell together in unity!
Genesis 37:4
And when his brethren saw that their father loved him more than all his brethren, they hated him, and could not speak peaceably unto him.