《资治通鉴·唐纪·唐纪五十八》
已亥，度支供给沧州军粮车六百辆行至下博县时，全部遭成德军抢夺。
己亥，度支馈沧州粮车六百乘，至下博，尽为成德军所掠。
In the year of Yihai, 600 chariots supplied by the Branch of Revenue Transports to Cangzhou army were entirely robbed by the Chengde army when they arrived at Xiabo County.