《新唐书·列传·卷九十一》
叛军围城共十个月，杜慆抚慰士兵，士兵都殊死奋战，又加上辛谠冲出冲进重围，联络集合援军，终于保全了整个州城，当时都赞扬他们难能可贵。
围凡十月，慆拊循士，皆殊死奋，而辛谠冒围出入，纠辑援师，卒完一州，时称为难。
The rebels besieged the city for a total of ten months. Du Bo comforted the soldiers, and the soldiers fought to the death. In addition, Xin Xi rushed in and out of the encirclement and contacted and gathered reinforcements, finally preserving the entire state and city. At that time, everyone praised them as rare and precious.