Acts 26:24

24 At this point Festus interrupted Paul’s defense. “You are out of your mind, Paul!” he shouted. “Your great learning is driving you insane.”

Read Acts 26:24 Using Other Translations

And as he thus spake for himself, Festus said with a loud voice, Paul, thou art beside thyself; much learning doth make thee mad.
And as he was saying these things in his defense, Festus said with a loud voice, "Paul, you are out of your mind; your great learning is driving you out of your mind."
Suddenly, Festus shouted, “Paul, you are insane. Too much study has made you crazy!”