(5) باب رَفْعِ الْعِلْمِ وَقَبْضِهِ وَظُهُورِ الْجَهْلِ وَالْفِتَنِ فِي آخِرِ الزَّمَانِ
Anas b. Malik reported Allah's Messenger (ﷺ) 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.
Reference: Sahih Muslim 2671 a
In-book reference: Book 47, Hadith 11
USC-MSA web (English) reference(deprecated numbering scheme): Book 34, Hadith 6451