《三国志·魏书·武文世王公传》
明帝下诏说： 中山王向来谨慎持重，偶然来到这里，还是用评价亲属的原则来评判吧。 
诏曰： 王素敬慎，邂逅至此，其以议亲之典议之。 
Emperor Ming decreed: “The king of Zhongshan has always been cautious. Even when he came here, I still used the standard for judging relatives to judge him.