Leviticus 19:  Regard not them that have familiar spirits, neither seek after wizards, to be defiled by them: I am the LORD your God.
And the soul that turneth after such as have familiar spirits, and after wizards, to go a whoring after them, I will even set my face against that soul, and will cut him off from among his people.
The well-known research writer, Dave Hunt, explains:
“Spiritism in Western Europe, England, and North America generally involves séances in which communication is received from spirits that usually claim to be dead relatives of the people present in the séance. However, Jesus taught that the dead cannot come back to speak with, or appear to, the living (Eccl. 9:5-6) . .
“A common thread of deceit runs through all the messages delivered by alleged spirits of the dead, regardless of the culture, place, or time in history, and by whatever means they communicate—whether in a seance, through a ouija board, during a hypnotic trance, or in spontaneous appearances. The spirit communicators (including alleged space beings) invariably repeat and elaborate the same lies the serpent told Eve. Their very claim to be spirits of the dead is a denial of what God said about death and an obvious attempt to support the serpent’s promise: ‘You won’t really die!’ The idea is always given that death involves no judgment and no heaven or hell, but is like stepping through a door into another room of life, where we continue to learn our lessons and to progress ever higher on our way to full godhood.”—Dave Hunt, The Cult Explosion, p. 145.