《宋史·列传·卷四十一》
宋真宗赵恒进升为皇储时，李沆升任礼部侍郎兼太子宾客，太宗诏东宫太子赵恒以师傅之礼对待李沆。
真宗升储，迁礼部侍郎兼太子宾客，诏东宫待以师傅礼。
When Zhao Heng, the Emperor Zhenzong of Song Dynasty, was promoted to the crown prince, Li Hang was promoted to the Minister of Rites and the Crown Prince's guest. Taizong ordered the Crown Prince Zhao Heng of the East Palace to treat Li Hang as a teacher.