《资治通鉴·唐纪·唐纪四十七》
德宗询问李泌： 河中距离京城很近，朔方兵马素来号称精锐，比如达奚小俊等人，都有万夫之勇，朕日夜为河中担忧，你看如何是好呢？ 
上问泌： 河中密迩京城，朔方兵素称精锐，如达奚小俊等皆万人敌，朕昼夕忧之，奈何？ 
Emperor Dezong asked Li Bi, “Hezhong is quite close to the capital, and the Shaanxi soldiers have long been known for their effectiveness. For example, Daxi Xiaojun and his ilk are all brave enough to fight a thousand men. I worry about Hezhong day and night. What do you think I should do?”