《三略·上略》
将帅谋划泄露，军队的有利态势便失去了。奸细窥得内情，军队的祸患便无法制止了。不义的财物进入军营，各种坏事便一齐发生了。
将谋泄，则军无势；外窥内，则祸不制；财入营，则众奸会。
When a commanding general's plans are leaked, the army's advantageous position is lost. When spies learn the inner workings of the army, the army's misfortune cannot be stopped. When ill-gotten wealth enters the military camp, all kinds of evils occur at once.