Diogenes Laertius Vitae philosophorum 4.6.36

[36] A certain dialectic, a follower of Alexinus, was unable to repeat properly some argument of his teacher, whereupon Arcesilaus reminded him of the story of Philoxenus and the brickmakers. He found them singing some of his melodies out of tune; so he retaliated by trampling on the bricks they were making, saying, If you spoil my work, I’ll spoil yours. He was, moreover, genuinely annoyed with any who took up their studies too late. By some natural impulse he was betrayed into using such phrases as I assert, and So-and-so (mentioning the name) will not assent to this. ¹ And this trait many of his pupils imitated, as they did also his style of speaking and his whole address.