[dware]

The Bible gives no endorsement of the validity or utility of communication with the dead or their effective intervention in the land of the living.”

In addition to the scripture in Luke, there is also this:

Regard not them that have familiar spirits, neither seek after wizards, to be defiled by them: I am the Lord your God. - Leviticus 19:31

[Fai Mao]

The sin of Saul was communicating with the dead