In a kingdom somewhere, the King is ill and must make one of his two sons his heir to the throne. He makes the following proposition: His two sons will ride their horses in a race and whichever horse crosses the finish line last, its owner will become the next in line to the throne. During the race, the two brothers wander aimlessly for days, neither willing to cross the finish line. In desperation, they ask their wise mother for advice. She tells them something; then the brothers leap onto the horses and charge toward the finish line. What did the mother say?