《元史·本纪·卷三十一》
成宗大德三年，命武宗抚治军马于北方边地，帝于大德四年十一月十一日出生。
成宗大德三年，命武宗抚军北边，帝以四年十一月壬子生。
In the third year of Chengzong Dade, Wuzong was ordered to appease the army in the northern border, and the emperor was born on November 11th in the fourth year of Dade.