《元史·列传·卷十四》
这时伯颜已病在床，对成宗说： 在朝廷内，中书省与枢密院应该分开为好，而在外地，若将军政分开则多有不便。 
冬十二月丙申，有大星陨于东北。
By that time, Bo Yan was bedridden with illness, and he said to Emperor Chengzong: “In the Imperial Court, the Secretariat and the Military Commission should be separate, while delegating military and political powers to the provinces causes many inconveniences.”