I know that the historical view on ghosts in Judaism is mixed. That being said, there does exists a belief in certain types of Ashkenazi folklore regarding a dybbuk. The belief is these being spirits of a disturbed former living soul which cling to an individual.
While this doesn't really exist as a regular thing on modern Jewish practice/belief, the question of it still makes me curious.
In the event as Jew believes they are dealing with a haunting of some sort, what would be the course of action they should take?
