From Sahih Bukhari (Hadith 5231):
Narrated Anas:I will narrate to you a Habith I heard from Allah's Messenger (ﷺ) and none other than I will tell you of it. I heard Allah's Messenger (ﷺ) saying, "From among the portents of the Hour are the following: Religious knowledge will be taken away; General ignorance (in religious matters) will increase; illegal Sexual intercourse will prevail: Drinking of alcoholic drinks will prevail. Men will decrease in number, and women will increase in number, so much so that fifty women will be looked after by one man
Reference: Bukhari 5231