《周书·列传·卷十三》
建德五年，大军再次向东讨伐北齐，高祖下诏命宇文纯为前一军，率步兵二万人据守千里径。
五年，大军复东讨，诏纯为前一军，率步军二万守千里径。
In the fifth year of Jiande, the army once again attacked Northern Qi to the east, and Gao Zu ordered Yu Wenjun to be the first army, leading 20,000 infantrymen to defend the thousand-mile path.