《北史·列传·卷十五》
当时太武帝前去中书学堂，他见到李后很是惊异，指着李对随从的人说： 这个孩子将来会效命于我的子孙。 
太武幸中书学，见而异之，指谓从者曰： 此小兒终效用于朕之子孙。 
At that time, Emperor Taiwu went to the Zhongshu Academy and was very surprised when he saw Li Bao. He pointed at Li Bao and said to his entourage, "This child will serve my descendants in the future."