Diogenes Laertius Vitae philosophorum 7.5.169

[169] and then to have been acquitted on producing as his witnesses the gardener in whose garden he drew water and the woman who sold the meal which he used to crush. The Areopagites were satisfied and voted him a donation of ten minas, which Zeno forbade him to accept. We are also told that Antigonus made him a present of three thousand drachmas. Once, as he was conducting some youths to a public spectacle, the wind blew his cloak aside and disclosed the fact that he wore no shirt, whereupon he was applauded by the Athenians, as is stated by Demetrius of Magnesia in his work on Men of the Same Name. This then also increased the admiration felt for him. There is another story that Antigonus when attending his lectures inquired of him why he drew water and received the reply, Is drawing water all I do? What? Do I not dig? What? Do I not water the garden? or undertake any other labour for the love of philosophy? For Zeno used to discipline him to this and bid him return him an obol from his wages. ¹