1 Samuel 28:14

And he said unto her, What form [is] he of? And she said, An old man cometh up; and he [is] covered with a mantle. And Saul perceived that it [was] (f) Samuel, and he stooped with [his] face to the ground, and bowed himself.

(f) To his imagination, even though it was Satan, who to blind his eyes took on him the form of Samuel, as he can do of an angel of light.