《笑林广记·谬误部》
父亲悲痛大哭，正在这时哥哥回来了，父亲于是大骂小儿子： 为何说如此假话？ 小儿子说： 我说的是官话。 
父方悲恸而兄已至，父遂骂其次子， 何得妄言如是？ 曰： 我自打官话耳。 
Their father cried in sorrow, and just then, the older brother returned, so their father shouted at the younger son: Why did you tell such a lie? The younger son said: I spoke in Mandarin.