Luke 11:18
"If Satan also be divided against himself, how shall his kingdom stand? because ye say that I cast out devils through Beelzebub."
Cross References (ranked by relevance)
Matthew 12:26
And if Satan cast out Satan, he is divided against himself; how shall then his kingdom stand?
Matthew 4:10
Then saith Jesus unto him, Get thee hence, Satan: for it is written, Thou shalt worship the Lord thy God, and him only shalt thou serve.
Luke 11:15
But some of them said, He casteth out devils through Beelzebub the chief of the devils.