《新唐书·列传·卷七十八》
真卿为清河郡派出六千援兵，对李萫说： 我的援兵已出发，您有什么计谋教给我呢？ 
真卿为出兵六千，谓曰： 吾兵已出，子将何以教我？ 
Zhenqing sent six thousand reinforcements from Qinghe county and said to Li Xie, "My reinforcements have already set out. What strategy do you have to teach me?"