Trials and Fierce Battles (Kitab Al-Fitan Wa Al-Malahim)
Dawud :: Book 35 : Hadith 4265
Narrated AbuMusa:
The Prophet (peace_be_upon_him) said: This people of mine is one to which mercy is shown. It will have no punishment in the next world, but its punishment in this world will be trials, earthquakes and being killed.