《资治通鉴·晋纪·晋纪十三》
游子远禀报刘曜，任虚除权渠为征西将军、西戎公，分别把伊余兄弟及其部落二十多万人迁徙至长安。
子远启曜，以权渠为征西将军、西戎公，分徙伊馀兄弟及其部落二十馀万口于长安。
You Ziyuan reported to Liu Yao, who appointed Xu Chuquan as General of the Western Expedition and Duke of Xirong, and moved Yuyu's brothers and more than 200,000 of his tribe to Chang'an.