When someone tells you to consult mediums and spiritists, who whisper and mutter, should not a people inquire of their God? Why consult the dead on behalf of the living? (Isaiah 8:19 NIV)
It is very strange that people would consult the dead (who obviously cannot speak) instead of the true and living God. Why would anyone have faith in the dead, seeing that none has ever come to life again?
Samuel said to Saul, "Why have you disturbed me by bringing me up?"
"I am in great distress," Saul said. "The Philistines are fighting against me, and God has departed from me. He no longer answers me, either by prophets or by dreams. So I have called on you to tell me what to do."
Samuel said, "Why do you consult me, now that the Lord has departed from you and become your enemy? The Lord has done what he predicted through me. The Lord has torn the kingdom out of your hands and given it to one of your neighbors - to David. Because you did not obey the Lord or carry out his fierce wrath against the Amalekites, the Lord has done this to you today. The Lord will deliver both Israel and you into the hands of the Philistines, and tomorrow you and your sons will be with me. The Lord will also give the army of Israel into the hands of the Philistines." (1 Samuel 28:15-19 NIV)