《资治通鉴·唐纪·唐纪五》
现在大王从滏口趁唐国空虚，连营渐进夺取山北并、代、汾、晋等地，又借助突厥的军队向西抄掠关中，唐军必然回师自救，还用担心郑国的东都之围不解吗？
今大王自滏口乘唐国之虚，连营渐进，以取山北，又因突厥西抄关中，唐必还师自救，郑围何忧不解！
Now the King has taken advantage of the emptiness of the Tang Dynasty from Fukou, gradually captured the north, and, substitute, and, substitute lands, and, substitute lands, etc., by taking the camp and advancing, and with the help of the Turkic army to plunder Guanzhong in the west, the Tang army will inevitably return to save itself. Do you still have to worry about Zheng's Dongdu siege not being lifted? 