1 Samuel 10:11
When all who knew him before saw that, behold, he prophesied with the prophets, then the people said to one another, “What is this that has come to the son of Kish? Is Saul also among the prophets?”
World English Bible (Public Domain)
In context
Before · 1 Samuel 10:9–10
9It was so, that when he had turned his back to go from Samuel, God gave him another heart; and all those signs happened that day. 10When they came there to the hill, behold, a band of prophets met him; and the Spirit of God came mightily on him, and he prophesied among them.
11When all who knew him before saw that, behold, he prophesied with the prophets, then the people said to one another, “What is this that has come to the son of Kish? Is Saul also among the prophets?”