《新唐书·列传·卷一百一十》
陈敬蠧想使自己的级别在其他宰相之上，郑畋说： 朝外的宰相怎能讲级别呢？ 
陈敬瑄欲以官品居宰相上，畋曰： 外宰相安得论品乎？ 
Chen Jingyan wanted to put his level above the other Prime Ministers. Zheng Tian said, "How can Prime Ministers be ranked outside the Imperial Court?"