《资治通鉴·唐纪·唐纪二十四》
另外，边疆各州的刺史，应当精选合适的人担任，让他们检阅兵马，积存粮草，敌人来则抵御，去则作预防。
又，边州刺史，宜精择其人，使之蒐卒乘，积资粮，来则御史，去则备之。
Besides, each governor of the border prefectures should carefully select suitable persons for the post. They should let them review the soldiers and horses, accumulate food and grass, resist the enemies when they come, and take precautions when they leave.