Albert Barnes Commentary 1 Samuel 28:7

"Then said Saul unto his servants, Seek me a woman that hath a familiar spirit, that I may go to her, and inquire of her. And his servants said to him, Behold, there is a woman that hath a familiar spirit at En-dor." — 1 Samuel 28:7 (ASV)

Enquire - This is a different word from the one in 1 Samuel 28:6, though nearly synonymous with it. It is more frequently applied to inquiring of a false god, for example, in 2 Kings 1:2, Isaiah 8:19, and Isaiah 19:3.

En-dor (see the note on Joshua 11:2) was seven or eight miles from the slopes of Gilboa, on the north of Little Hermon, where the Philistines were encamped. Therefore, Saul must have run great risks in going there.