《资治通鉴·唐纪·唐纪五十四》
现在，天子出兵攻打成德，你却使整个卢龙的兵马披甲不卧，坐以待敌，连一个人也没有渡过易水，这就恰好让潞州人认为卢龙以小恩小惠收买成德，因而向皇上败坏卢龙忠于朝廷的名声，在这两方面他们都能达到目的。
今天子伐赵，君坐全燕之甲，一人未济易水，此正使潞人以燕卖恩于赵，败忠于上，两皆售也。
Now, the Emperor has sent troops to attack Chengde, but you have made the entire army of Ludong wear armor and not sleep, waiting for the enemy without crossing the Yishui River. This will make the people of潞州 think that Ludong is bribing Chengde with small favors and harming Ludong's reputation of loyalty to the court before the Emperor. They can achieve their goals in both these respects.