《明史·列传·卷二十七》
士元出狱后，士利于是作书数千言，谈了好几件事，而对于空印事件谈得十分详细，他说： 陛下想重重地处罚持空印者，恐怕奸吏挟持空印纸，为文移以虞害万民。
士元出，士利乃为书数千言，言数事，而于空印事尤详。曰： 陛下欲深罪空印者，恐奸吏得挟空印纸，为文移以虐民耳。
After Shi Yuan was released from prison, Shi Li wrote a letter of several thousand words, discussing several issues, and talking in great detail about the blank seal case. He said: His Majesty wants to punish those who hold blank seals heavily, fearing that corrupt officials will hold blank seal paper, for official documents, so as to harm the people.