Abu Hurairah reported the Prophet (May peace be upon him) as saying:The last hour will not come before the Muslims fight with the Turks, a people whose faces look as if they were shields covered with skin, and who will wear sandals of hair.
حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا يَعْقُوبُ، - يَعْنِي الإِسْكَنْدَرَانِيَّ - عَنْ سُهَيْلٍ، - يَعْنِي ابْنَ أَبِي صَالِحٍ - عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ تَقُومُ السَّاعَةُ حَتَّى يُقَاتِلَ الْمُسْلِمُونَ التُّرْكَ قَوْمًا وُجُوهُهُمْ كَالْمَجَانِّ الْمُطْرَقَةِ يَلْبَسُونَ الشَّعْرَ " .
AbuDaud
Battles (Kitab Al-Malahim) • Hadith 4303