1 Samuel 28:3-7

Now Samuel was dead, and all Israel had mourned him and buried him in Ramah, his own city. And Saul had removed the mediums and spiritists from the land.

So the Philistines assembled and came and camped in Shunem; and Saul gathered all Israel together, and they camped in Gilboa.

When Saul saw the camp of the Philistines, he was afraid and his heart trembled greatly.

So Saul inquired of the Lord, but the Lord did not answer him, either in dreams, or by the Urim, or by the prophets.

Then Saul said to his servants, “Find for me a woman who is a medium, so that I may go to her and inquire of her.” And his servants said to him, “Behold, there is a woman who is a medium at En-dor.”