1 Samuel 28:15

And Samuel, the apparition of the evil spirit which had the form of Samuel, said to Saul, Why hast thou disquieted me, to bring me up? And Saul answered, I am sore distressed, in great straits; for the Philistines make war against me, and God is departed from me, and answereth me no more, neither by prophets nor by dreams; therefore I have called thee, have caused thee to be called, that thou mayest make known unto me what I shall do. There was a contradiction in Saul's appeal, which shows that he knew himself to be asking counsel of the devil, for if God would not answer him by the living prophets, what satisfaction could he have gotten from the dead? This is also brought out by the spirit.