1 Samuel 28:5 (KJV)

Now 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 had familiar spirits, and the wizards, out of the land.

And the Philistines gathered themselves together, and came and pitched in Shunem: and Saul gathered all Israel together, and they pitched in Gilboa.

And when Saul saw the host of the Philistines, he was afraid, and his heart greatly trembled.

And when Saul enquired of the Lord, the Lord answered him not, neither by dreams, nor by Urim, nor by prophets.

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 En–dor.