Protection Dhikr

The 'Dhikr' is Protected

Executive Summary   How do we know that the revelation that has reached us has been protected?  Does that protection only extend to the Qur’ānic text?  If it does, then what of the Prophetic Sunnah?  Is that not revelation also? Understanding how the revelation has been protected is a fundamental issue that one cannot be ignorant of.  Especially since this core issue fits into the wider matter of understanding and applying