《宋史·列传·卷一百四十七》
有一天对宇文价说 ：我曾答应李焘书写 续资治通鉴长编 七个大字，并按照神宗赏赐司马光的事例，为他的书写序，没想到到此为止了。 
他日谓宇文价曰： 朕尝许焘大书 续资治通鉴长编 七字，且用神宗赐司马光故事，为序冠篇，不谓其止此。 
One day, he said to Yu Wenjia: "I promised Li Tao to write seven large characters: "Continuation of Zizhi Tongjian Changbian", and I also wrote the preface for his book according to the example of Shenzong rewarding Sima Guang. I didn't expect it to end here."