《明史·志·卷六十八》
另外养马的恩队军不够，请求登记流亡百姓以及判处遣送回籍的人，姑且比照充军戍边的罪人的规定，凡是发配边境卫所充军的，改为到各苑牧马，增加为三千人。
又养马恩队军不足，请编流亡民及问遣回籍者，且视恩军例，凡发边卫充军者，改令各苑牧马，增为三千人。
In addition, there are not enough horse-raising officers and soldiers. Therefore, we request to register displaced people and those sentenced to return to their hometowns. We can temporarily refer to the regulations for criminals who are forced to serve in the army. Those who are assigned to the border guards to serve should be changed to the pastures to raise horses, increasing the number to 3,000 people.