《资治通鉴·宋纪·宋纪七》
柔然国处罗可汗郁久闾吐贺真将国内所有精锐部队调来，把拓跋那的部队包围了几十层，拓跋那挖深沟坚守阵地。
柔然处罗可汗悉国中精兵围那数十里；那掘堑坚守，相持数日。
The Rouran ruler, Chuluo Khan, Yujiulü Tuhezhen, assembled all his elite troops and surrounded Tuoba Na's troops with dozens of layers of troops. Tuoba Na defended the stronghold by digging a deep ditch.