Om Swami
Why shouldn't I pass on what others say behind someone's back?
Backbiting carried over solves nothing
Telling someone what another person said about them does not solve any purpose, because it is one person's opinion expressed behind their back, so chances are it is not even true. Never react on any information that is not passed on to you directly.
One of my principles in life is never to react to any information that is not passed to me directly. Even if it is about me, if it was meant for me it would have been told to me directly.