《明史·列传·卷六十六》
当初，绥德州是延绥镇的地方官署所在地，所辖米脂县、吴堡县都在镇外，敌寇用轻骑进来劫掠，等镇兵发觉而去追击，总是追赶不上，敌寇往往得利而去。
初，延绥镇治绥德州，属县米脂、吴堡悉在其外。寇以轻骑入掠，镇兵觉而追之，辄不及，往往得利去。
At that time, Suide Prefecture was the location of the local government office in Yansui Town, and the counties of Mizhi and Wupu under its jurisdiction were outside the town. The enemy used light cavalry to invade and plunder. When the town soldiers discovered and went to pursue them, they always failed to catch up, and the enemy often escaped with their loot.