Sahih Muslim Book 34, Hadith Number 6458.

Chapter : Knowledge would be taken away and ignorance would prevail upon people and the turmoil at the end of the world.

Abu Huraira reported Allah’s Messenger (may peace be upon him) as saying: (When) the time would draw close to the Last Hour, knowledge would be snatched away, turmoil would be rampant, miserliness would be put (in the hearts of the people) and there would be much bloodshed. They said: What is al-harj? Thereupon he said: It is bloodshed.