《资治通鉴·宋纪·宋纪三》
八月，北魏国主拓跋焘抵达漠南，听说高车国东部屯居在已尼陂，人口繁盛，牲畜众多，距魏军只有一千余里。于是，拓跋焘派遣左仆射安原等统率一万名骑兵进攻高车。
八月，魏主至漠南，闻高车东部屯巳尼陂，人畜甚众，去魏军千馀里，遣左仆射安原等将万骑击之。
In August, Tuoba Tao, the leader of the Northern Wei Dynasty, arrived in Mo Nan and heard that the eastern part of the Gao Che Kingdom was settled in Yi Nibao, with a large population, many livestock, and only a thousand miles away from the Wei army. Therefore, Tuoba Tao sent Zuo Pushe Anyuan and others to lead 10,000 cavalrymen to attack Gao Che.