《资治通鉴·唐纪·唐纪四十三》
早晨将要出发，号角尚未吹完，士兵忽然大乱，大声喊叫： 皇上命令司徒回幽州去，为何违背敕令南下援救田悦！ 
诘旦将行，吹角未毕，士卒忽大乱，喧噪曰： 天子令司徒归幽州，奈何违敕南救田悦！ 
When the troops were about to depart the next morning, while the bugle was still sounding, the soldiers suddenly burst into an uproar and shouted, "His Majesty has ordered the Presidential Assistant to return to Youzhou. Why is he disobeying the imperial decree and going south to aid Tian Yue?"