Chapter 2, Verses 10, 11 and 12 - Sun Tzu

Poverty of the State exchequer causes an army to be maintained by contributions from a distance. Contributing to maintain an army at a distance causes the people to be impoverished. On the other hand, the proximity of an army causes prices to go up; and high prices cause the people's substance to be drained away. When their substance is drained away, the peasantry will be afflicted by heavy exactions.
~ from The Art of War, Giles translation ~

Go here to read the introductory post to the verses of The Art of War.