《史记·七十列传·匈奴列传》
第二年，匈奴向右北平和定襄各派数万骑兵入侵，杀死和抢夺千余人而去。
其明年，匈奴入右北平、定襄各数万骑，杀略千馀人而去。
In the following year, the Huns sent tens of thousands of cavalry to Right Beiping and Dingxiang respectively, killing and plundering more than a thousand people.