Allah will bring a man from Abasina named Dhus Wakatain. This man will tear down Kaba brick by brick and nobody will find out about it because people will stop performing Hajj and Umrah around that time.
Narrated Abu Huraira: The Prophet صَلىَّ اللهُ عَلَيْهِ وَسَلَّمْ said, “Dhus-Suwaiqa-tain (literally: One with two lean legs) from Ethiopia will demolish the Ka`ba.” (Sahih al-Bukhari 1591)
Narrated Ibn `Abbas: The Prophet صَلىَّ اللهُ عَلَيْهِ وَسَلَّمْ said, “As if I were looking at him, a black person with thin legs plucking the stones of the Ka`ba one after another. ” (Sahih al-Bukhari 1595)
Narrated Abdullah ibn Amr ibn al-‘As:
The Prophet صَلىَّ اللهُ عَلَيْهِ وَسَلَّمْ said: “Leave the Abyssinians alone as long as they leave you alone, for it is only the Abyssinian with short legs who will seek to take out the treasure of the Ka’bah”. (Sunan Abi Dawud 4309)