Bede the Venerable
Catena Aurea · Lukasevangelium 11
When the unclean spirit is gone out of a man, he walketh through dry places, seeking rest; and finding none, he saith, I will return unto my house whence I came out. And when he cometh, he findeth it swept and garnished. Then goeth he, and taketh to him seven other spirits more wicked than himself; and they enter in, and dwell there: and the last state of that man is worse than the first.
It may also be simply understood, that our Lord added these words to shew the distinction between the works of Satan and His own, that in truth He is ever hastening to cleanse what has been defiled, Satan to defile with still greater pollution what has been cleansed.