《资治通鉴·唐纪·唐纪六十》
唐文宗召集宰相商议对策，牛僧孺说： 幽州自从安禄山、史思明以来，一直割据跋扈，实际上已不属于朝廷管辖了。穆宗皇帝在位时，幽州节度使刘总曾经归顺朝廷，然而，朝廷花费了八十万缗钱，却一无所获。
上召宰相谋之，牛僧孺曰： 范阳自安、史以来，非国所有，刘总暂献其地，朝廷费钱八十万缗而无丝毫所获。
Emperor Wenzong of Tang summoned his prime ministers to deliberate a policy. Niu Sengru said: Since An Lushan and Shi Siming took over, Youzhou has been isolated and domineering and actually no longer belongs to the jurisdiction of the court. During the reign of Emperor Muzong, Liu Zong, the Jiedushi of Youzhou, once surrendered to the court, but the court spent 800,000 guan of money, but to no avail.