Plutarch Quaestiones Convivales 2.1.12

[12] Again, those jokes are accounted less affronting which reflect somewhat also on the man that makes them; as when one poor man, base-born fellow, or lover jokes upon another. For whatever comes from one in the same circumstances looks more like a piece of mirth than a designed affront; but otherwise it must needs be irksome and distasteful. Upon this account, when a slave whom the King had lately feed and enriched behaved himself very impertinently in the company of some philosophers, asking them, how it came to pass that the broth of beans, whether white or black, was always green, Aridices putting another question, why, let the whips be white or not, the wales and marks they made were still red, displeased him extremely, and made him rise from the table in a great rage and discontent. But Amphias the Tarsian, who was supposed to be sprung from a gardener, joking upon the governor’s friend for his obscure and mean birth, and presently subjoining, But ’tis true, I sprung from the same seed, caused much mirth and laughter. And the harper very facetiously put a check to Philip’s ignorance and impertinence; for when Philip pretended to correct him, he cried out, God forbid, sir, that ever you should be brought so low as to understand these things better than I. For by this seeming joke he instructed him without giving any offence. Therefore some of the comedians seem to lay aside their bitterness in every jest that may reflect upon themselves; as Aristophanes, when he is merry upon a bald-pate; and Cratinus in his play Pytine upon drunkenness and excess.