Sahih Muslim Book 41, Hadith Number 6956.

Chapter : The Last Hour would not come until a person would pass by a grave and wish that he should have been the occupant of that grave because of this calamity.

Abu Huraira reported Allah’s Messenger (may peace be upon him) as saying: The Last Hour would not come unless you fight with people whose faces are like hammered shields and the Last Hour would not come until you would fight against those wearing the shoes of hair.