《明史·列传·卷九十二》
军队从武库里索领甲仗，管库宦官按常例进行勒索，不按时发放武器，长久下来就不能打仗。
从武库索甲仗，主库奄人勒常例，不时发。久之不能军。
The army asked the armory for armor and weapons, and the eunuch in charge of the armory extorted them as usual, not issuing weapons on time, and in the long run, they could not fight.