1 Samuel 28:14-16
New King James Version (NKJV)
14 So he said to her, “What is his form?”
And she said, “An old man is coming up, and he is covered with a mantle.” And Saul perceived that it was Samuel, and he stooped with his face to the ground and bowed down.
15 Now Samuel said to Saul, “Why have you disturbed me by bringing me up?”
And Saul answered, “I am deeply distressed; for the Philistines make war against me, and God has departed from me and does not answer me anymore, neither by prophets nor by dreams. Therefore I have called you, that you may reveal to me what I should do.”
16 Then Samuel said: “So why do you ask me, seeing the LORD has departed from you and has become your enemy?
If it had been Samuel, he would have told Saul to bow to no one except God as the angel in Revelations told John, he would have refused worship. So you see a display of how demons lie and why mediums and dealing with familiar spirits are forbidden for they allow people to give voice to doctrines of demons. Did you not read that David refuse to kill Saul for he was still God's annointed? did you not read that David had the guy who beheaded Saul put to death?
Revelation 19:10
And I fell at his feet to worship him. But he said to me, “See that you do not do that! I am your fellow servant, and of your brethren who have the testimony of Jesus. Worship God! For the testimony of Jesus is the spirit of prophecy.”