《资治通鉴·宋纪·宋纪五》
等到姑臧城被攻陷，北魏国主拓跋焘，派镇南将军、代郡人奚眷袭击张掖；派镇北将军封沓进攻乐都。
及姑臧破，魏主遣镇南将军代人奚眷击张掖，镇北将军封沓击乐都。
When Guzang City was captured, the Northern Wei leader Tuoba Tao sent Zhennan General Xi Juan of Daijun to attack Zhangye; and sent Zhenbei General Fengta to attack Ledu.