《后汉书·列传·皇甫张段列传》
又我以前在左校劳动改造时，太学生张凤等人上书为我申诉，这是党人拉拢我，我应当论罪。 
又臣昔论输左校时，太学生张凤等上书讼臣，是为党人所附也。
Also, when I was doing labor reform in the Zuo School, Zhang Feng and other students wrote to appeal for me. This was the party trying to win me over, and I should be convicted.