1 Samuel 28:5-7

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.”