History of the Northern Dynasties: Yuwen Shu and Xue Shixiong were defeated at the Sa River; the nine armies of the detached force collapsed and…
Yuwen Shu and Xue Shixiong were defeated at the Sa River; the nine armies of the detached force collapsed and turned back. They withdrew in the seventh month.
壬午，宇文述等敗績於薩水，右屯衛將軍薛世雄死之
Location: 北史 卷12 大業8年
Yuwen Shu and others were defeated at the Sa River; the Grand General of the Right Garrison Xin Shixiong died, and of the nine armies only about two thousand cavalry returned alive.
宇文述等敗績于薩水，右屯衞將軍辛世雄死之。九軍並陷
Location: 隋書 卷004 帝紀 大業8年7月