《后汉书·列传·王刘张李彭卢列传》
议论的人们以为围攻柏人不如平定巨鹿，光武于是引兵到东北围攻巨鹿。
议者以为守柏人不如定巨鹿，光武乃引兵东北围巨鹿。
The strategists believed that it was better to attack the huge deer than to besiege Bairen, so Guangwu led his troops to the northeast to besiege the huge deer.