The Book Pertaining to the Turmoil and Portents of the Last Hour (Kitab Al-Fitan wa Ashrat As-Sa`ah)
Muslim :: Book 41 : Hadith 6960
Abu Huraira reported Allah's Messenger (may peace be upon him) as saying: You shall fight in the hours to come against a nation wearing shoes made of hair and faces like hammered shields, with red complexion and small eyes.