《庄子·外篇·田子方》
于是哀公发布这样命令，五天以后鲁国没有敢穿儒服的人。
于是哀公号之五日，而鲁国无敢儒服者。
So Ai Gong issued such an order, and five days later there was not a single person in Lu who dared to wear the cap and gown of the Confucian scholars.