Sahih Muslim Book 34, Hadith Number 6457.

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

Abu Wa’il reported: I was sitting with Abu Musa and ‘Abdullah and they were conversing with each other and Abu Musa reported Allah’s Messenger (may peace be upon him) as saying (that we find in the above-mentioned ahadith).