Isaiah 8:19-20

Now, suppose someone says, “Consult mediums and spiritists who moan and mutter their incantations in their ritual pits; after all, isn’t it right for people to seek oracles from their gods by asking the dead about the destiny of the living?” You are to answer them: “Listen to the teaching and instruction of the Lord! If their speech does not line up with his word, they will have no light of dawn!