《北史·列传·卷八十七》
这时，沙钵略既被达头可汗困挠，又畏惧东面的契丹，派遣使者向隋朝告急，请求带领部落人马到大漠南边，寄居在白道川里。
时沙钵略既为达头所困，又东畏契丹，遣使告急，请将部落度漠南，寄居白道川内。
At this time, Sabolo, who had been harassed by Datou Khan and was also afraid of the Khitan in the east, sent an envoy to the Sui Dynasty for help, requesting to lead his tribe's men and horses to the south of the Gobi Desert and settle in Baidao River.