Luke 11:24-26

24 "When an unclean spirit comes out of a person, it travels through dry country seeking rest. On finding none, it says, `I will return to the house I left.'

25 When it arrives, it finds the house swept clean and put in order.

26 Then it goes and takes seven other spirits more evil than itself, and they come and live there -- so that in the end the person is worse off than he was before."