《明史·本纪·卷十五》
十二月四日，因出现彗星，命群臣修身反省，陈述军民利弊得失。
十二月辛亥，以彗星见，敕群臣修省，陈军民利病。
On December 4th, following the observation of a comet, the emperor ordered all officials to reflect on their personal conduct and submit written reports on the strengths and weaknesses of the military and the people.