The Prophet;; said, "Dhus-Suwaiqa-tain (literally: One with two lean legs) from Ethiopia will demolish the Kaʿba."  

عَنِ النَّبِيِّ ﷺ قَالَ يُخَرِّبُ الْكَعْبَةَ ذُو السُّوَيْقَتَيْنِ مِنَ الْحَبَشَةِ  

The people used to fast on 'Ashura (the tenth day of the month of Muharram) before the fasting of Ramadan was made obligatory. And on that day the Kaʿba used to be covered with a cover. When Allah made the fasting of the month of Ramadan compulsory, Messenger of Allah ﷺ said, "Whoever wishes to fast (on the day of 'Ashura') may do so; and whoever wishes to leave it can do so."  

أَنْ يُفْرَضَ رَمَضَانُ وَكَانَ يَوْمًا تُسْتَرُ فِيهِ الْكَعْبَةُ فَلَمَّا فَرَضَ اللَّهُ رَمَضَانَ قَالَ رَسُولُ اللَّهِ ﷺ مَنْ شَاءَ أَنْ يَصُومَهُ فَلْيَصُمْهُ وَمَنْ شَاءَ أَنْ يَتْرُكَهُ فَلْيَتْرُكْهُ  

The Prophet ﷺ said "The people will continue performing the Hajj and ʿUmra to the Kaʿba even after the appearance of Gog and Magog." Narrated Shuʿba extra: The Hour (Day of Judgment) will not be established till the Hajj (to the Kaʿba) is abandoned.  

عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ ؓ عَنِ النَّبِيِّ ﷺ قَالَ لَيُحَجَّنَّ الْبَيْتُ وَلَيُعْتَمَرَنَّ بَعْدَ خُرُوجِ يَأْجُوجَ وَمَأْجُوجَ