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. (Using translation from Muslim 2912a)
النَّبِيَّ ﷺ لَا تَقُومُ السَّاعَةُ حَتَّى تُقَاتِلُوا قَوْمًا كَأَنَّ وُجُوهَهُمُ الْمَجَانُّ الْمُطْرَقَةُ نِعَالُهُمُ الشَّعْرُ