I Samuel 10:11-12

And it happened, when all who knew him formerly saw that he indeed prophesied among the prophets, that the people said to one another, “What is this that has come upon the son of Kish? Is Saul also among the prophets?” Then a man from there answered and said, “But who is their father?” Therefore it became a proverb: “Is Saul also among the prophets?”