I Samuel 28:3-8

Now Samuel had died, and all Israel had lamented for him and buried him in Ramah, in his own city. And Saul had put the mediums and the spiritists out of the land. Then the Philistines gathered together, and came and encamped at Shunem. So Saul gathered all Israel together, and they encamped at Gilboa. When Saul saw the army of the Philistines, he was afraid, and his heart trembled greatly. And when Saul inquired of the LORD, the LORD did not answer him, either by dreams or by Urim or by the prophets. Then Saul said to his servants, “Find me a woman who is a medium, that I may go to her and inquire of her.” And his servants said to him, “In fact, there is a woman who is a medium at En Dor.” So Saul disguised himself and put on other clothes, and he went, and two men with him; and they came to the woman by night. And he said, “Please conduct a séance for me, and bring up for me the one I shall name to you.”