An Arab sheik tells his two sons to race their camels to a distant city to see who will inherit his fortune. The one whose camel is slower will win. The brothers, can't figure out how they can have a fair race under that condition. After wandering aimlessly for days, they ask a wise man for advice. After hearing his advice they jump onto the camels and race as fast as they can to the distant city. What did the wise man say to them?