《资治通鉴·汉纪·汉纪四》
刘敬的计策本已粗疏了，何况公主鲁元已经成了赵王王后，又怎么能夺回来呢！
建信侯之术，固已疏矣；况鲁元已为赵后，又可夺乎！
Liu Jing's plan was already crude. Moreover, Princess Luyuan had already become the Queen of King Zhao. How could she be taken back?