In Defence of Euxenippus (21)

so that you can ruin Euxenippus by alleging that he flatters her and the Macedonians. If you show us that he has ever been to Macedon or entertained any of the people in his own home, that he knows a Macedonian intimately or meets any of them; if you prove that he has said one word about such matters, either in a shop or in the market or anywhere else, instead of quietly and modestly minding his own business as much as any other citizen, the jury may do what they like with him.