Musnad Ahmad 30:1498

Husayn ibn Muhammad narrated to us, Ibn Abi Dhi’b informed us, from Sa’id ibn Sam’an, that he heard Abu Hurayrah informing Abu Qatadah that the Messenger of Allah (peace and blessings of Allah be upon him) said: "Allegiance will be pledged to a man between the Corner and the Station. And this House will not be violated except by its own people. So when they violate it, do not ask about the destruction of the Arabs. Then the Abyssinians will come and destroy it with a destruction after which it will never be inhabited again, and they are the ones who will extract its treasure."