《北史·列传·卷三十一》
李崇挥军出塞，驰驱三千余里，没有赶上退去的敌人而班师回来。
遂出塞三千余里，不及贼而还。
Li Chong led his army out of the border, traveled more than three thousand miles, did not catch up with the retreating enemy and returned to the army.