《资治通鉴·汉纪·汉纪三十二》
右辅都尉严本害怕刘玄被赤眉军所杀，就挟持刘玄到高陵，严本亲自率兵守卫，实际是把刘玄包围起来。
右辅都尉严本，恐失更始为赤眉所诛，即将更始至高陵，本将兵宿卫，其实围之。
The Right Adjutant Yan Ben was afraid that Liu Xuan would be killed by the Red Eyebrow Army, so he escorted Liu Xuan to Gaoling, where Yan Ben led soldiers to guard him, but actually he besieged Liu Xuan.