Al-Lu'lu Wal-Marjan 1832 — The Book of Al-Fitn (Trials and Afflictions etc.) and the Portents of the Hour

Usama Narrated from:

Once the Prophet صلى الله عليه وسلم stood on the top of a castle amongst the castles (or the high buildings) of Al-Madîna and said, "Do you see what I see? (No doubt) I see the places or spots of Al-Fitn (trials and afflictions etc.) among your houses (and these Al-Fitn will be) as numerous as the spots where rain-drops fall." ( Sahîh Al-Bukhârî, Hadîth No. 102, Vol. 3)