《新唐书·列传·卷一百三十八》
张宿回去后，李师道又后悔了，召集众将商讨。大家都说： 蔡州那么几个州，朝廷打了三四年才打下来，公现在有十二州，有什么可担心的？ 
宿既还，师道中悔，召诸将议，皆曰： 蔡数州，战三四年乃克，公今十二州，何所虞？ 
After Zhang Su returned, Li Shidao regretted it again and summoned his generals to discuss it. They all said: "Caizhou only had a few prefectures, and the court spent three or four years to conquer them. You have twelve prefectures now, so what's there to worry about?"