1 Samuel 13:3

And it happened when he had arrived, that he blew the trumpet in the hill country of Ephraim; and the sons of Israel went down with him from the hill country, and he was in front of them.

“Afterward you will come to the hill of God where the Philistine garrison is; and it shall be as soon as you have come there to the city, that you will meet a group of prophets coming down from the high place with harp, tambourine, flute, and a lyre before them, and they will be prophesying.

Now Saul and his son Jonathan and the people who were present with them were staying in Geba of Benjamin, and the Philistines camped at Michmash.