There is a saying attributed to the Prophet during the Battle of Uhud:
فتى إلا علي لا سيف إلا ذو الفقار لا
'There is no hero like Ali; There is no sword like Dhu-l-Fiqar'
Now the Shia say it was said by archangel Jibril/a voice on the battlefield etc (something along those lines, correct me if I'm wrong).
My question is what is the Sunni view on the authenticity of this quote, because the Ottoman Janissaries had this quote on their flags and they were Sunni.
Also is it permissible to wear a zulfiqar (for a Sunni)? Not trying to mimic the Shia or Alevi.