《周书·本纪·卷二》
大军东征时，关中留守兵员较少，而前后俘虏的东魏士兵，都散在民间，于是图谋叛乱。
大军之东伐也，关中留守兵少，而前后所虏东魏士卒，皆散在民间，乃谋为乱。
When the army marched east, there were few reserve soldiers in Guanzhong, and the soldiers of the Eastern Wei who were captured before and after were scattered among the people, so they planned a rebellion.