1 Samuel 28:3-9

3Now Samuel was dead, and all Israel had lamented him, and buried him in Ramah, even in his own city. And Saul had put away those that were mediums, and the wizards, out of the land. 4And the Philistines gathered themselves together, and came and encamped in Shunem: and Saul gathered all Israel together, and they encamped in Gilboa. 5And when Saul saw the host of the Philistines, he was afraid, and his heart greatly trembled. 6And when Saul enquired of the LORD, the LORD answered him not, neither by dreams, nor by Urim, nor by prophets.

7Then said Saul to his servants, Seek me a woman that is a medium, that I may go to her, and enquire of her. And his servants said to him, Behold, there is a woman that hath a medium at Endor. 8And Saul disguised himself, and put on other raiment, and he went, and two men with him, and they came to the woman by night: and he said, I pray thee, divine to me as a medium, and bring up for me, whom I shall name to thee. 9And the woman said to him, Behold, thou knowest what Saul hath done, how he hath cut off those that are mediums, and the wizards, out of the land: Why then layest thou a snare for my life, to cause me to die?