Sahih al-Bukhari, Volume 9, Book 88, Hadith 184 (USC-MSA) ⓘ
Narrated `Abdullah and Abu Musa: The Prophet said, "Near the establishment of the Hour there will be days during which Religious ignorance will spread, knowledge will be taken away (vanish) and there will be much Al-Harj, and Al- Harj means killing."
حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُوسَى، عَنِ الأَعْمَشِ، عَنْ شَقِيقٍ، قَالَ كُنْتُ مَعَ عَبْدِ اللَّهِ وَأَبِي مُوسَى فَقَالاَ قَالَ النَّبِيُّ صلى الله عليه وسلم " إِنَّ بَيْنَ يَدَىِ السَّاعَةِ لأَيَّامًا يَنْزِلُ فِيهَا الْجَهْلُ، وَيُرْفَعُ فِيهَا الْعِلْمُ، وَيَكْثُرُ فِيهَا الْهَرْجُ، وَالْهَرْجُ الْقَتْلُ " .
also referenced under: Book 92, Hadith 14 (In-Book) & Hadith 7062 (DarusSalam)