(18) بَاب لَا تَقُومُ السَّاعَةُ حَتَّى يَمُرَّ الرَّجُلُ بِقَبْرِ الرَّجُلِ فَيَتَمَنَّى أَنْ يَكُونَ مَكَانَ الْمَيِّتِ مِنْ الْبَلَاءِ
Abu Huraira reported Allah's Messenger (ﷺ) as saying:
The Last Hour would not come until the Muslims fight with the Turks-a people whose faces would be like hammered shields wearing clothes of hair and walking (with shoes) of hair.
Reference: Sahih Muslim 2912 d
In-book reference: Book 54, Hadith 79
USC-MSA web (English) reference(deprecated numbering scheme): Book 41, Hadith 6959