1 Samuel 28:8

they came to the woman by night It was an adventurous journey. They had to pass over the shoulder of the hill on which the Philistines were encamped, and traverse a distance of not less than ten or twelve miles. The darkness around was a fit emblem of the darkness in Saul's soul. Cp. John 13:30, and Augustine's comment "Nox erat, et ipse qui exivit erat nox," (It was night, and he who went forth was night).

bring me him up, &c. A more precise definition of the method of divination "by Ob." Cp. Deuteronomy 18:10-11. Probably Saul expected to hear a voice, but not to see a form. Necromancy was practised among the Greeks and other heathen nations. There was a famous oracle of this kind on the River Acheron in Epirus (νεκυομαντεῖον).