Chapter 7, Verse 31 - Sun Tzu

To be near the goal while the enemy is still far from it, to wait at ease while the enemy is toiling and struggling, to be well-fed while the enemy is famished: -- this is the art of husbanding one's strength.
~ from The Art of War, Giles translation ~

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