Musnad Ahmad 30:1232

Abu al-Nadr narrated to us, from Ibn Abi Dhi'b, and Ishaq ibn Sulayman, who said: Ibn Abi Dhi'b narrated to us, from Sa'id ibn Sam'an, who said: I heard Abu Hurayrah narrating to Abu Qatadah that the Prophet, peace and blessings of Allah be upon him, said: "A man will be given the pledge of allegiance between the Corner and the Station. The House will not be violated except by its own people. If they violate it, then do not ask about the destruction of the Arabs. Then the Abyssinians will come and destroy it, a destruction after which it will never be rebuilt, and they are the ones who will extract its treasure."