'Abdullah ibne-'Amr ibnil-'As Radiyallahu 'anhuma narrates that Rasullullah Sallallahu 'alaihi wasallam said: Allah will not take away knowledge of Deen from people at once, but will withdraw knowledge by the death of 'Ulama until no 'Alim will be left, people will take ignorant men as their leaders. They will be asked question relating to Deen and they will give verdict without knowledge. They being astray will lead others astray. (Bukhari: 100)