《资治通鉴·汉纪·汉纪三十四》
建武七年春季，三月，免去郡县、封国的轻车、骑士、材官，命他们回归为民。
世祖光武皇帝中之上建武七年春，三月，罢郡国轻车、骑士、材官，令还复民伍。
In the spring of the seventh year of Jianwu, in the third month, the light chariots, cavalry, and local officials were dismissed from the counties and fiefdoms, and they were ordered to return to civilian life.