The Ass and His Shadow
A Traveler hired an Ass to carry him through the desert. At midday, the sun was blazing, so he stopped to rest in the Ass’s shadow. But the driver of the Ass said, “You paid to ride him, not to sit in his shade. That shadow is mine!”
They began to argue, and while they were fighting, the Ass ran away.
Moral: While you fight over small things, you may lose everything.