"After that, you are to go on to the Hill of God, where the Philistine prefects reside. There, as you enter the town, you will encounter a band of prophets coming down from the shrine, preceded by lyres, timbrels, flutes, and harps, and they will be speaking in ecstasy. The spirit of the Lord will grip you, and you will speak in ecstasy along with them; you will become another man. And once these signs have happened to you, act when the occasion arises, for God is with you."
The Holy Bible (Tanakh) 1 Samuel 10:5-8