[Aristotle] was the most eminent of all the pupils of Plato…. He seceded from Plato while he was still alive; so that they tell a story that [Plato] said, "Aristotle has kicked us off, just as chickens do their mother after they have been hatched."

''The Lives and Opinions of Eminent Philosophers'', Book V, "Life of Aristotle" paragraphs II and IV, as translated by C. D. Yonge - In Diogenes Laërtius