What did Prophet Muhammad (saw) observe when he stood atop one of the castles or higher buildings of Medina?
 Narrated Usama bin Zaid:                     Once the Prophet stood at the top of one of the castles (or higher buildings) of Medina and said, "Do you see what I see? No doubt I am seeing the spots of afflictions amongst your houses as numerous as the spots where raindrops fall (during a heavy rain). (See Hadith No. 102)