1 Samuel 10:11 in the King James Version
And it came to pass, when all that knew him beforetime saw that, behold, he prophesied among the prophets, then the people said one to another, What is this that is come unto the son of Kish? Is Saul also among the prophets?
Context
10 When 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.
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?”
12 One from the same place answered, “Who is their father?” Therefore it became a proverb, “Is Saul also among the prophets?”