《明史·列传·卷一百九十二》
九年，北边有警报，皇上命张永督领宣府、大同、延绥的军队抵御，敌人退走后才回来。
九年，北边有警，命永督宣府、大同、延绥军御之，寇退乃还。
Nine years later, there was an alert in the north, the Emperor ordered Zhang Yong to lead the armies of Xuanfu, Datong, and Yansui to resist, only returning after the enemy retreated.