《资治通鉴·唐纪·唐纪六十三》
假如朝廷命令河阳出动一万兵力在天井关修筑营垒，堵塞昭义向南的通道，高壁深沟，坚守而不出战；同时，只要征调忠武、武宁两个藩镇的军队，加上青州的五千精兵，宣州和润州的二千弓箭手，大军长驱直捣上党，不出几个月，必定倾复刘稹的巢穴！ 
若使河阳万人为垒，窒天井之口，高壁深堑，勿与之战。只以忠武、武宁两军，贴以青州五千精甲，宣、润二千弩手，径捣上党，不过数月，必覆其巢穴矣！ 
If the court orders Heyang to dispatch 10,000 troops to build fortifications at Tianjing Pass, blocking Zhaoyi's passage to the south, with high walls and deep trenches, and to defend without fighting; at the same time, as long as the troops of the Zhongwu and Wuning藩 towns are requisitioned, plus the 5,000 elite troops of Qingzhou, and the 2,000 archers of Xuanzhou and Runzhou, the army will go straight to Shangdang, and within a few months, Liu Zhen's lair will definitely be overthrown!