《太平广记·卷二百三十八·诡诈》
凤阁侍郎李昭德用刀将乌龟肚腹上的字都刮掉了，并上奏武则天皇后，用法律来制裁胡延庆。武则天回答说：这样做并不是什么坏心啊。
以进之，凤阁侍郎李昭德以刀刮之并尽。奏请付法，则天曰：此非恶心也。
Li Zhaode, the Minister of the Phoenix Pavilion, used a knife to scrape off all the characters on the tortoise's belly and reported to Empress Wu Zetian, requesting that Hu Yanging be punished by law. Wu Zetian replied: There was no malicious intent in doing so.