Matthew 12:43-45

When an evil spirit leaves someone, it wanders through deserted places looking for rest, and finds nowhere to stay. So it says, ‘I'll go back to the place I left,’ and when it returns it finds the place empty, all clean and tidy. Then it goes and brings back seven other spirits even more evil than it is, and it enters and lives there. So the person ends up worse than they were at the beginning. That's the way it will be with this evil generation.”