1 Samuel 28:5-8 King James Version (KJV)
5 And when Saul saw the host of the Philistines, he was afraid, and his heart greatly trembled.
6 And when Saul enquired of the Lord, the Lord answered him not, neither by dreams, nor by Urim, nor by prophets.
7 Then said Saul unto his servants, Seek me a woman that hath a familiar spirit, that I may go to her, and enquire of her. And his servants said to him, Behold, there is a woman that hath a familiar spirit at Endor.
8 And 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 unto me by the familiar spirit, and bring me him up, whom I shall name unto thee.