《资治通鉴·汉纪·汉纪三十二》
更始朝将领武勃率领一万余人攻打叛变者，冯异和武勃在士乡交战，大破武勃军，斩武勃。李轶紧闭城门，不予救助。
武勃将万馀人攻诸畔者，异与战于士乡下，大破，斩勃；轶闭门不救。
The general of the Gengshi dynasty, Wu Bo, led over 10,000 men to attack rebels. Feng Yi and Wu Bo fought at Shixiang, and Wu Bo's army was heavily defeated. Wu Bo was killed. Li Yi closed the city gates and did not come to his aid.