《资治通鉴·汉纪·汉纪十八》
酒泉太守辛武贤上奏说： 各郡军队都屯扎在南山，使北部边疆空虚，其势难以长久。
酒泉太守辛武贤奏言： 郡兵皆屯备南山，北边空虚，势不可久。
Xin Wuxian, the governor of Jiuquan, submitted a memorial saying: The troops from all the commanderies are stationed at Nanshan, leaving the northern border empty. This situation cannot last.