Messenger of Allah ﷺ said, "From among the portents of the Hour are (the following): -1. Religious knowledge will be taken away (by the death of Religious learned men). -2. (Religious) ignorance will prevail. -3. Drinking of Alcoholic drinks (will be very common). -4. There will be prevalence of open illegal sexual intercourse.

قَالَ رَسُولُ اللَّهِ ﷺ إِنَّ مِنْ أَشْرَاطِ السَّاعَةِ أَنْ يُرْفَعَ الْعِلْمُ وَيَثْبُتَ الْجَهْلُ وَيُشْرَبَ الْخَمْرُ وَيَظْهَرَ الزِّنَا

I will narrate to you a Hadith and none other than I will tell you about after it. I heard Messenger of Allah ﷺ saying: From among the portents of the Hour are (the following): -1. Religious knowledge will decrease (by the death of religious learned men). -2. Religious ignorance will prevail. -3. There will be prevalence of open illegal sexual intercourse. -4. Women will increase in number and men will decrease in number so much so that fifty women will be looked after by one man.

لأُحَدِّثَنَّكُمْ حَدِيثًا لاَ يُحَدِّثُكُمْ أَحَدٌ بَعْدِي سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ مِنْ أَشْرَاطِ السَّاعَةِ أَنْ يَقِلَّ الْعِلْمُ وَيَظْهَرَ الْجَهْلُ وَيَظْهَرَ الزِّنَا وَتَكْثُرَ النِّسَاءُ وَيَقِلَّ الرِّجَالُ حَتَّى يَكُونَ لِخَمْسِينَ امْرَأَةً الْقَيِّمُ الْوَاحِدُ