《资治通鉴·汉纪·汉纪四十五》
于是，鲜卑人在南方劫掠沿边各郡，北方抗拒丁零，东方击退夫余，西方进击乌孙，完全占领匈奴的故土，东西广达一万四千余里。
因南抄缘边，北拒丁零，东却夫馀，西击乌孙，尽据匈奴故地，东西万四千馀里。
Accordingly, the Xianbei people plundered the border commanderies in the south, resisted the Dingling in the north, repelled the Fuyu in the east, and attacked the Wusun in the west, completely taking over the land formerly held by the Xiongnu, and expanding their territory more than 14,000 miles from east to west.