Volume 4 · Book 56 · Hadith 796
Narrated Usama: Once the Prophet stood on one of the high buildings (of Medina) and said, "Do you see what I see? I see affliction pouring among your hours like raindrops."
— Sahih Bukhari, Volume 4, Book 56: Virtues and Merits of the Prophet (pbuh) and his Companions, Hadith #796