A lion hid in a coward farmer's house when it was hunted by a hunter. He saved it.

When the lion said goodbye to the farmer, he said:"you will not be saved again in future because you don't understand how to thank people who helped you." So, the lion held  a sheep with its mouth to thanked him.

The farmer said again:"you should remember  who is your true friend when you were traped." Then, the lion hunted a deer for him.

Next, the farmer said:"I saved your life, you should take me as your parent." And the lion took much more things for him.

But the greedy farmer still didn't meet the lion's thankness, he said:"you know what, you should be my loyal servant  because my kindness covered over all your repay.  

The lion said:"Did I escaped from a hunter's hunting just for hiding myself behind a mean guy? The hunter cared only for my fur and leather, but you, wanna get my soul."

Chinese Source: http://www.360duzhe.com/post/17925/tan-xin-de-nong-ren.html