《明史·志·卷六十五》
又命令宦官所引荐的勇士，必须由兵部检验派遣纔发给军饷，每隔五年登记四卫军的人数，写定著录为法令。
又令内臣所进勇士，必由兵部验送乃给廪，五年籍其人数，著为令。
It was also ordered that the warriors recommended by eunuchs must be inspected and dispatched by the Ministry of War before military pay was issued, and the number of troops in the four guards was registered every five years, written down and recorded as law.