Sahih al-Bukhari 6808
Narrated Anas:
I will narrate to you a narration which nobody will narrate to you 
     after me. I heard that from the Prophet. I heard the Prophet (ﷺ) saying, 
     "The Hour will not be established" or said: "From among the portents 
     of the Hour is that the religious knowledge will betaken away (by the 
     death of religious Scholars) and general ignorance (of religion) will 
     appear; and the drinking of alcoholic drinks will be very common, and 
     (open) illegal sexual intercourse will prevail, and men will decrease 
     in number while women will increase so much so that, for fifty women 
     there will only be one man to look after them."
أَخْبَرَنَا دَاوُدُ بْنُ شَبِيبٍ، حَدَّثَنَا هَمَّامٌ، عَنْ قَتَادَةَ، أَخْبَرَنَا أَنَسٌ، قَالَ لأُحَدِّثَنَّكُمْ حَدِيثًا لاَ يُحَدِّثُكُمُوهُ أَحَدٌ بَعْدِي، سَمِعْتُهُ مِنَ النَّبِيِّ صلى الله عليه وسلم سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يَقُولُ ‏
"‏ لاَ تَقُومُ السَّاعَةُ ـ وَإِمَّا قَالَ مِنْ أَشْرَاطِ السَّاعَةِ ـ أَنْ يُرْفَعَ الْعِلْمُ وَيَظْهَرَ الْجَهْلُ، وَيُشْرَبَ الْخَمْرُ، وَيَظْهَرَ الزِّنَا، وَيَقِلَّ الرِّجَالُ، وَيَكْثُرَ النِّسَاءُ، حَتَّى يَكُونَ لِلْخَمْسِينَ امْرَأَةً الْقَيِّمُ الْوَاحِدُ ‏"‏‏.‏