كتاب الفتن وأشراط الساعة
54  
The Book of Tribulations and Portents of the Last Hour
(18)
Chapter: The Hour Will Not Begin Until A Man Passes By Another Man's Grave And Wishes That He Was In The Place Of The Deceased, Because Of Calamity
(18)
بَاب لَا تَقُومُ السَّاعَةُ حَتَّى يَمُرَّ الرَّجُلُ بِقَبْرِ الرَّجُلِ فَيَتَمَنَّى أَنْ يَكُونَ مَكَانَ الْمَيِّتِ مِنْ الْبَلَاءِ
Sahih Muslim 2912 b

Abu Huraira reported Allah's Messenger (ﷺ) as saying:

The Last Hour would not come until a people wearing shoes of hair fight against you having their faces like hammered shields.
وَحَدَّثَنِي حَرْمَلَةُ بْنُ يَحْيَى، أَخْبَرَنَا ابْنُ وَهْبٍ، أَخْبَرَنِي يُونُسُ، عَنِ ابْنِ شِهَابٍ، أَخْبَرَنِي سَعِيدُ بْنُ الْمُسَيَّبِ، أَنَّ أَبَا هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ لاَ تَقُومُ السَّاعَةُ حَتَّى تُقَاتِلَكُمْ أُمَّةٌ يَنْتَعِلُونَ الشَّعَرَ وُجُوهُهُمْ مِثْلُ الْمَجَانِّ الْمُطْرَقَةِ ‏"‏ ‏.‏
Reference : Sahih Muslim 2912b
In-book reference : Book 54, Hadith 77
USC-MSA web (English) reference : Book 41, Hadith 6957
  (deprecated numbering scheme)