The Jade Rabbit that lives on the moon...

"Three fairy sages transformed themselves into pitiful old men and begged for something to eat from a fox, a monkey and a rabbit. The fox and the monkey both had food to give to the old men, but the rabbit, empty-handed, offered his own flesh instead, jumping into a blazing fire to cook himself. The sages were so touched by the rabbit's sacrifice that they let him live in the Moon Palace where he became the 'Jade Rabbit'."