《魏书·帝纪·卷四》
二十七日，世祖巡视云中。秋季七月十五日，世祖命抚军大将军、永昌王拓跋健，司空、上党王长孙道生，在西河讨伐山胡白龙余党，消灭了他们。
秋七月戊子，使抚军大将军、永昌王健，司空、上党王长孙道生，讨山胡白龙余党于西河，灭之。
On the 27th day, Shizu inspected Yunchong. On the 15th day of the 7th month of autumn, Shizu ordered General Fu, King Tuoba Jian of Yongchang, Sikon, and King Changsun Daosheng of Shangdang to pacify the remnants of the White Dragon Shanhus in Xihe, which were wiped out.