《后汉书·列传·刘虞公孙瓚陶谦列传》
建安四年春天，黑山贼首领张燕与公孙续率兵十万，分三路来救公孙瓒。
四年春，黑山贼帅张燕与续率兵十万，三道来救瓚。
In the spring of the fourth year of Jian'an, the leader of the Heishan bandits, Zhang Yan, and Gongsun Xu led 100,000 troops in three ways to rescue Gongsun Zan.