1 Samuel 10:9-13

9Then it happened, as Saul turned his back to leave Samuel, that God transformed his heart, and all those signs came to pass that day.

10When they arrived there, at the hill, behold, a band of prophets did meet him, and suddenly, the Ruach of God overtook him, and subsequently, he prophesied among them.

11So when all who knew him formerly saw him prophesying with the prophets, they said one to another, “What has happened to the son of Kish? Is Saul also among the prophets?”

12(Someone there asked, “Who is their father?”) Therefore it became a proverb, “Is Saul also among the prophets?”

13When he finished prophesying, he came to the high place.