Virtues and Merits of the Prophet (pbuh) and his Companions
حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، حَدَّثَنَا جَرِيرُ بْنُ حَازِمٍ، سَمِعْتُ الْحَسَنَ، يَقُولُ حَدَّثَنَا عَمْرُو بْنُ تَغْلِبَ، قَالَ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ " بَيْنَ يَدَىِ السَّاعَةِ تُقَاتِلُونَ قَوْمًا يَنْتَعِلُونَ الشَّعَرَ، وَتُقَاتِلُونَ قَوْمًا كَأَنَّ وُجُوهَهُمُ الْمَجَانُّ الْمُطْرَقَةُ ".Narrated `Umar bin Taghlib:I heard Allah's Messenger (ﷺ) saying, "Near the Hour you will fight with people who will wear hairy shoes; and you will also fight people with flat faces like shields
From Sahih al-Bukhari, whose reports the scholars accept as authentic.