《资治通鉴·唐纪·唐纪三十三》
您如果能够杀掉不愿意归附朝廷的将领，以范阳归顺朝廷，倾覆安禄山叛军的巢穴，就等于建立了千古不朽的功勋。 
公若诛诸将之不从命者，以范阳归国，倾其根柢，此不世之功也。 
If you can kill the generals who are unwilling to submit to the court, and submit to the court with Fanyang, and overthrow the An Lushan rebel army's nest, it would be equivalent to establishing an eternal achievement.