《韩非子·外储说左上》
现在大王要想使民众不穿紫衣服，就请先自己脱下紫衣服去上朝。群臣中有穿紫衣服进见的人，就说： 再离我远些，我厌恶那种气味。  
今王欲民无衣紫者，王请自解紫衣而朝，群臣有紫衣进者，曰： 益远！
Now, if Your Majesty wishes the people not to wear purple clothing, then please first take off your own purple clothing and go to court. If there are any ministers who come to meet you wearing purple clothing, say: Please stand far away from me, I detest that smell.