《资治通鉴·汉纪·汉纪三十八》
于是北匈奴大且渠伊莫訾王等人，驱赶牛马一万余匹前来，准备同汉朝交易。南匈奴单于派轻装骑兵从上郡出发对他们进行袭击，夺取大批牲畜后返回。
北匈奴大且渠伊莫訾王等驱牛马万馀头来与汉交易，南单于遣轻骑出上郡钞之，大获而还。
So the Northern Xiongnu King Yimozi led more than ten-thousand cavalry and horses to participate in trade with Han. The Southern Xiongnu sent light cavalry to attack them from Shangjun 郡. They seized a great deal of cattle and then retreated.