Sahih Muslim Book - 52, Hadith - 7313

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ حَدَّثَنَا يَعْقُوبُ - يَعْنِى ابْنَ عَبْدِ الرَّحْمَنِ - عَنْ سُهَيْلٍ عَنْ أَبِيهِ عَنْ أَبِى هُرَيْرَةَ أَنَّ رَسُولَ اللَّهِ -صلى الله عليه وسلم- قَالَ « لاَ تَقُومُ السَّاعَةُ حَتَّى يُقَاتِلَ الْمُسْلِمُونَ التُّرْكَ قَوْمًا وُجُوهُهُمْ كَالْمَجَانِّ الْمُطْرَقَةِ يَلْبَسُونَ الشَّعَرَ وَيَمْشُونَ فِى الشَّعَرِ ».

It was narrated from Abu Hurairah that the Messenger of Allah (s.a.w) said: "The Hour will not begin until the Muslims fight the Turks, a people with faces like hammered shields, wearing clothes made from hair and shoes made from hair."