(5) باب ظُهُورِ الْفِتَنِ
Narrated `Abdullah:
The Prophet (ﷺ) said, "Near the establishment of the Hour, there will be the days of Al-Harj, and the religious knowledge will be taken away (vanish i.e. by the death of Religious scholars) and general ignorance will spread." Abu Musa said, "Al-Harj, in the Ethiopian language, means killing."
Reference: Sahih al-Bukhari 7066
In-book reference: Book 92, Hadith 17
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 9, Book 88, Hadith 187