《明史·志·卷二十四》
因为郊祀礼重大，不宜由臣子代行，请求等到圣上身体康复，改换占卜吉日行礼。 
盖以郊祀礼重，不宜摄以人臣，请俟圣躬痊，改卜吉日行礼。 
Given the importance of the jiaosi ceremony, it would be wrong for a minister to officiate in one’s place; let us wait for Your Majesty to recover and then choose a fortunate day from the divination to hold the ceremony.