《北史·列传·卷三十二》
延昌二年，宣武帝到东宫，召见崔光与黄门甄琛、广阳王元深等人，赐给他们座位，对崔光说： 你是我中书省的大臣，应当让你当太子的老师。 
延昌元年，迁中书监，侍中如故。二年，宣武幸东宫，召光与黄门甄琛、广阳王深等并赐坐，诏光曰： 卿是朕西台大臣，当令为太子师傅。 
In the second year of Yanchang era, Emperor Xuanwu went to the Eastern Palace, summoned Cui Guang, Huangmen Zhen Chen, Guangyang Prince Yuan Shen and others, offered them seats, and said to Cui Guang, "You are the minister of my Zhongshu Province, and you should be the teacher of the Crown Prince." 