《南齐书·列传·卷二十四》
你好好筹划这事，有紧急情况就命令小股戍守部队集结到城裹防守，不要敌人来了还不知道。
卿好参候之，有急令诸小戍还镇，不可贼至不觉也。
You should plan this matter carefully. In the event of an emergency, you should order a small garrison force to gather in the city for defense, so that you won't know when the enemy arrives.