《后汉书·列传·东夷列传》
朝廷于是征调广阳、渔阳、右北平、涿郡属国的三千多骑兵一同援救，但貊人已经撤离。
于是发广阳、渔阳、右北平、涿郡属国三千余骑同救之，而貊人已去。
The imperial court then dispatched more than 3,000 cavalry from Guangyang, Yuyang, Youbeiping, and Zhuojun to the rescue, but the Mo people had already withdrawn.