《新唐书·列传·卷四》
刘武周进犯汾、晋地区，朝廷下诏派遣右卫将军宇文歆协助他防守并州。
刘武周略汾、晋，诏遣右卫将军宇文歆助守。
When Liu Wuzhou invaded the Fen and Jin regions, the imperial court issued an edict to send General of the Right Yuwen Xin to assist him in defending Bing Province.