How can i thank you

One day, a poor man is taking a bag of rice to a town. The rice is on the back of his horse but it falls down. The rice is too heavy to lift and he doesn’t know what to do. He only hopes someone can give him some help.After a while, a man riding a horse comes. But he is a rich man living nearby. The poor man hopes another farmer will come. But the rich man sees him and says to him, “You need my help, right?” And he helps the poor man lift the rice onto the horse’s back.“Sir, how can I repay you?” the poor man says.“It’s easy, when you see anyone else in trouble, do the same for him.”