1 Samuel 28:1-7

In those days the Philistines gathered their forces for war, to fight against Israel. And Achish said to David, “Understand that you and your men are to go out with me in the army.” David said to Achish, “Very well, you shall know what your servant can do.” And Achish said to David, “Very well, I will make you my bodyguard for life.” Now Samuel had died, and all Israel had mourned for him and buried him in Ramah, his own city. And Saul had put the mediums and the necromancers out of the land. The Philistines assembled and came and encamped at Shunem. And Saul gathered all Israel, 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 prophets. Then Saul said to his servants, “Seek out 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 medium at En-dor.”