Sahih Bukhari
Afflictions and the End of the World
Volume: 009 / Book Number: 088 / Hadith Number: 182
Narrated Usama bin Zaid:
Once the Prophet stood over one of the high buildings of Medina and then said (to the people), "Do you see what I see?" They said, "No." He said, "I see afflictions falling among your houses as rain drops fall."