《资治通鉴·汉纪·汉纪十一》
夏季，霍去病又与合骑侯公孙敖率领数万骑兵同时从北地分两路出击匈奴，卫尉张骞、郎中令李广也同时从右北平分路出击。
夏，去病复与合骑侯公孙敖将数万骑俱出北地，异道。卫尉张骞、郎中令李广俱出右北平，异道。
In the summer, Huo Qubing and Heqi Marquis Gongsunao together led tens of thousands of cavalrymen to simultaneously set out from Beidi in two separate routes to attack the Huns; Weiwei Zhangqian and Langzhongling Li Guang also simultaneously set out from Youbeiping in a separate route to attack.