《明史·列传·卷五十九》
到了以后，杨善的馆伴和他在帐中饮酒，诧异地问杨善： 土木之役，你们的军队为何胆怯呢？ 
既至，其馆伴与饮帐中，诧善曰： 土木之役，六师何怯也？ 
After he got there, Yang Shan's camp companion drank with him in his tent, and asked Yang Shan in astonishment: "In the Tumubao Incident, why did your army become so cowardly?"