《后汉书·列传·吴盖陈臧列传》
光武攻掠河北，刘嘉以书信推荐陈俊，光武以陈俊为安集掾。
光武徇河北，嘉遣书荐俊，光武以为安集掾。
Emperor Guangwu attacked and pillaged Hebei. Liu Jia recommended Chen Jun in a letter, so Emperor Guangwu appointed Chen Jun as the Bureaucrat in Charge of Relief and Tranquility.