《资治通鉴·后晋纪·后晋纪一》
后唐末帝说： 延寿正在与贼兵争斗，哪有空暇去往镇州！
唐主曰： 延寿方击贼，何暇往镇州！
The Last Emperor of the Later Tang dynasty responded: Yanshou is busy fighting the rebels right now, how will he have free time to go to Zhenzhou!