《资治通鉴·晋纪·晋纪七》
东赢公向拓跋猗求兵攻打刘渊，拓跋猗与弟拓跋猗卢联合在西河进攻刘渊，把刘渊打败，与司马腾在汾东结盟后回师。
东嬴公腾乞师于拓跋猗㐌以击刘渊，猗㐌与弟猗卢合兵击渊于西河，破之，与腾盟于汾东而还。
Dong Yinggong asked Tuoba Yi to provide troops to attack Liu Yuan. Tuoba Yi joined forces with his brother Tuoba Yiyu to attack Liu Yuan in Xihezong, defeating him and returning his troops after allying with Sima Teng in Fenzhong.