《元史·本纪·卷十七》
十六日，中书省大臣上奏说： 狂妄的人冯子振曾经写诗赞誉桑哥，而且涉及大话，待桑哥身败，却控告撰写辅政碑的词臣用语不当，国史院的编修官陈孚揭发他的奸状，请求免究他的罪责，遣送他回家。 
丁未，中书省臣言： 妄人冯子振尝为诗誉桑哥，且涉大言，及桑哥败，即告词臣撰碑引谕失当，国史院编修官陈孚发其奸状，乞免所坐，遣还家。 
On the sixteenth day, the officials of the Secretariat submitted a memorial, saying: The arrogant man Feng Zizhen once wrote a poem praising Sangge, and uttered wild words, but when Sangge fell, he accused the minister who wrote the monument to the regent of impropriety. Chen Fu, the compiler of the National History Institute, exposed his deception and asked to exempt him from his crimes and send him home.