《后汉书·列传·王刘张李彭卢列传》
建武五年，光武派遣骠骑大将军杜茂攻佼强于西防，佼强与刘纡逃奔董宪。
五年，遣骠骑大将军杜茂攻佼彊于西防，彊与刘纡奔董宪。
In the fifth year of Jianwu, Emperor Guangwu sent the Great General of the Cavalry, Du Mao, to attack Jiaoqiang in Xifang. Jiaoqiang and Liu Yu fled to Dong Xian.