《宋史·本纪·卷三十五》
秋七月十七日，诏令内外各军主帅推举可以担任统制官二三人。
秋七月壬辰，诏内外诸军主帅各举堪统制者二三人。
On the 17th of the seventh month of autumn, an imperial edict ordered all the commanders-in-chief of the armies inside and outside the Great Wall to recommend two or three people who could serve as commander-in-chief.