《资治通鉴·宋纪·宋纪三》
柔然汗国纥升盖可汗郁久闾大檀逃走以后，他的部落四处流散，躲藏在荒山深谷之中，牛马等牲畜遍布原野，没有人收集照料。
柔然纥升盖可汗既走，部落四散，窜伏山谷，杂畜布野，无人收视。
After Yugujulü Datan, the Khan of Rouran Khanate, fled, his tribes scattered and hid in the mountains and deep valleys, with cattle and horses scattered all over the plains, and no one collected and cared for them.