Language:
كتاب الفتن
92  
Afflictions and the End of the World
(5)
Chapter: The appearance of Al-Fitan
(5)
باب ظُهُورِ الْفِتَنِ
Sahih al-Bukhari 7062, 7063

Narrated `Abdullah and Abu Musa:

The Prophet (ﷺ) 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 ‏"‏‏.‏
Reference : Sahih al-Bukhari 7062, 7063
In-book reference : Book 92, Hadith 14
USC-MSA web (English) reference : Vol. 9, Book 88, Hadith 184
  (deprecated numbering scheme)