The Prophet ﷺ said, "Near the establishment of the Hour there will be days during which (religious) knowledge will be taken away (vanish) and general ignorance will spread, and there will be Al-Harj in abundance, and Al-Harj means killing."
جَلَسَ عَبْدُ اللَّهِ وَأَبُو مُوسَى فَتَحَدَّثَا فَقَالَ أَبُو مُوسَى قَالَ النَّبِيُّ ﷺ إِنَّ بَيْنَ يَدَىِ السَّاعَةِ أَيَّامًا يُرْفَعُ فِيهَا الْعِلْمُ وَيَنْزِلُ فِيهَا الْجَهْلُ وَيَكْثُرُ فِيهَا الْهَرْجُ وَالْهَرْجُ الْقَتْلُ