(1) باب ذِكْرِ الْفِتَنِ وَدَلاَئِلِهَا
Narrated Abdullah ibn Mas'ud:
The Prophet (ﷺ) said: four (majestic) trials (fitnahs) will take place among this community, and in their end there will be destruction.
Reference: Sunan Abi Dawud 4241
In-book reference: Book 37, Hadith 2
English translation: Book 36, Hadith 4229