《宋史·列传·卷五十二》
契丹的强盛，不及当年的军臣单于，至于外敌骚扰边境、侵犯要塞方面，又怎会有侦察骑兵进到雍州，战火照到甘泉的忧患呢？
契丹之强盛，不及军臣单于，至如挠边侵塞，岂有候骑至雍，而火照甘泉之患乎？
The strength of the Khitan is not as good as that of the military minister of the past, and as for foreign enemies harassing the border and encroaching on the fortresses, how could there be the worry of reconnaissance cavalry reaching Yongzhou and the flames of war lighting up Ganquan?