《明史·列传·卷三十五》
二十二年幼孜随从皇上北征，途中士兵疲惫，皇上向群臣问对策，没有人敢回答。
二十二年从北征，中道兵疲。
Twenty-two years Yuzi followed the emperor to conquer the north. On the way, the soldiers were tired. The emperor asked the ministers for countermeasures, but no one dared to answer.