1 Samuel 28:7-8

Then Saul said to his servants, “Seek for me a woman who has a familiar spirit, that I may go to her and enquire of her.” His servants said to him, “Behold, there is a woman who has a familiar spirit at Endor.” Saul disguised himself and put on other clothing, and went, he and two men with him, and they came to the woman by night. Then he said, “Please consult for me by the familiar spirit, and bring me up whomever I shall name to you.”