The selfish horse
Once, a trader had a donkey and a horse. Everyday, he would load the donkey heavily and ride on the horse to the city to sell things, but he would not burden the horse at all.
One hot day, the donkey felt dizzy. He asked the horse politely to share some of his load but the horse refused saying that it was not his duty to carry loads.
Soon the donkey swooned and fell down due to extreme heat.
The trader then transferred all the load onto the horse's back and continued his journey.