1 Samuel 10:11-12

Now when all who knew Saul previously saw that he actually prophesied now [by inspiration] with the prophets, the people said one to another, “What has happened to [Saul, who is nobody but] the son of Kish? Is Saul also among the prophets?” And a man from there answered, “But who is the father of the others?” So it became a proverb, “Is Saul also among the prophets?”