What is the moral of this Pañcatantra story?
Book I — Mitrabheda (Loss of Friends)
The Lion and the Cunning Jackal
A foolish lion was tricked by a clever jackal into fighting a stronger lion, losing his life needlessly through false pride and poor counsel.
अत्यन्तकोपः कुलनाशकारी
Which moral does this story teach?