A jackal, seeing a lion, expressed his wish to be his servant. The lion
agreed and provided him with food. On growing strong, the jackal offered to kill
an elephant and, in spite of the lion's warnings, was trampled to death. The
lion was the Bodhisatta and the jackal Devadatta.
The story was related in reference to Devadatta's attempt to imitate the
Buddha. J. iii.112ff.