《新唐书·列传·卷三十八》
徐有功处在唐、周交替的时代，周兴、来俊臣等人压制正义包庇邪恶，喜爱讲颠倒是非的坏话，诬陷道德崇高的人，徐有功坚持到死申张正义，多次差点儿被杀，这些都胜过张释之是明显得很的。 有人认为徐有功仁爱宽容超过了汉朝的于定国、张释之。起居舍人卢若虚说 ：徐公面对则天皇后雷霆般的威严，却能保全仁爱宽容，即使千年之内还不见有人赶得上他。 
五世孙商。赞曰： 徐有功不以唐、周贰其心，惟一于法，身蹈死以救人之死，故能处猜后、酷吏之间，以恕自将，内挫虐焰，不使天下残于燎，可谓仁人也哉！议者谓过汉于、张，渠不信夫！
Xu Yougong was in the era of the change from Tang to Zhou. Zhou Xing, Lai Junchen and others suppressed justice and harbored evil. They liked to tell upside-down and righting the wrong bad words and framed people with high moral character. Xu Yougong insisted on upholding justice until his death and was almost killed several times. These were obviously better than Zhang Shizhi. Some people believe that Xu Yougong's benevolence and tolerance surpassed that of Yu Dingguo and Zhang Shizhi of the Han Dynasty. Lu Ruo虚, a resident of Qi Yiju, said : "Xu Gong can maintain benevolence and tolerance in the face of the thunderous majesty of Empress Wu Zetian. Even in a thousand years, no one can catch up with him. "