《魏书·帝纪·卷三》
二年春正月甲寅初一，韶令南平公长孙嵩等人北伐蠕蠕。
二年春正月甲寅朔，诏南平公长孙嵩等北伐蠕蠕。
In the first month of spring in the second year, Jia Yin's first day, Shao ordered the Duke of Nanding, Changsun Song, and others to go north and attack the Rourans.