1 Samuel 28:3-11

Now Samuel had died, and all Israel had mourned for him and buried him in Ramah, his own city. And Saul had removed the mediums and the spiritists (soothsayers) from the land. The Philistines assembled and came and camped at Shunem; and Saul gathered all the Israelites and they camped at Gilboa. When Saul saw the Philistine army, he was afraid and badly shaken. So Saul inquired of the LORD, but the LORD did not answer him, either by dreams or by Urim [used like lots by the priest to determine the will of God] or by prophets. [Prov 1:24-30] Then Saul said to his servants, “Find for me a woman who is a medium [between the living and the dead], so that I may go to her and ask her advice.” His servants said to him, “There is a woman who is a medium at En-dor.” So Saul disguised himself by wearing different clothes, and he left with two men, and they came to the woman at night. He said to her, “Conjure up for me, please, and bring up [from the dead] for me [the spirit] whom I shall name to you.” But the woman said to him, “See here, you know what Saul has done, how he has cut off (eliminated) those who are mediums and spiritists from the land. So why are you laying a trap for my life, to cause my death?” Then Saul swore [an oath] to her by the LORD, saying, “As the LORD lives, no punishment shall come upon you for this.” So the woman said, “Whom shall I bring up for you?” He said, “Bring up Samuel for me.”