Sahih Muslim Book 34, Hadith Number 6451.

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

Anas b. Malik reported Allah’s Messenger (may peace be upon him) as saying: It is from the conditions of the Last Hour that knowledge would be taken away and ignorance would prevail (upon the world), the liquor would be drunk, and adultery would become rampant.