One of his fables is called the lion and the mouse where the moral is kindness is never wasted; here is that story about a lion and a mouse.
In the story the mouse is trapped under the lions paw and the mouse is screaming to get out, the mouse says to spare him and he will surely repay him.
Later in the story the lion is caught in a poachers net and roars shaking the entire jungle, the mouse hears the roar and rushes to help him. The mouse aggressively chews through the net setting the lion free.