1 Samuel 28:3-7

Now Samuel was dead, and all Israel had lamented him and buried him in Ramah, his own city. And Saul had removed from the land those who were mediums and spiritists. So the Philistines gathered together and came and camped in Shunem; and Saul gathered all Israel together and they camped in Gilboa. When Saul saw the camp of the Philistines, he was afraid and his heart trembled greatly. When Saul inquired of the LORD, the LORD did not answer him, either by dreams or by Urim or by prophets. Then Saul said to his servants, “Seek for me a woman who is a medium, that I may go to her and inquire of her.” And his servants said to him, “Behold, there is a woman who is a medium at En-dor.”