《周书·列传·卷十》
建德四年，高祖东征，宇文椿与齐王宇文宪攻陷武济等五座城。
四年，高祖东伐，椿与齐王宪攻拔武济等五城。
During the fourth year of Jiande, Emperor Gaozu launched an eastward campaign, and Yuwen Chun and Qi Wang Yuwen Xian captured five cities, including Wujize.