《汉书·传·傅常郑甘陈段传》
过了很久，敦煌太守上奏书说： 陈汤以前亲自诛杀了郢支单于，在外国威望很大，不适宜接近边塞。 
久之，敦煌太守奏： 汤前亲诛郅支单于，威行外国，不宜近边塞。 
After a long while, the Inspector of Dunhuang submitted a memorial stating that Chen Tang had once killed the Chanyu of Yinchu with his own hand, and that his reputation abroad was too great to be suited to a frontier post.