《资治通鉴·唐纪·唐纪七十六》
李克用听到后，叹息道： 上年皇上若是听从了我的话，怎么会有今天的祸患！ 
李克用闻之，叹曰： 去岁从余言，岂有今日之患！ 
When he heard this, Li Kegong sighed: "If the emperor had listened to me last year, how could he have fallen into this predicament today!"