Musnad Ahmad 28:575

Ahmad ibn Abd al-Malik al-Harrani narrated to us, Muhammad ibn Salamah narrated to us, from Muhammad ibn Ishaq, from Ibn Abi Najih, from Mujahid, from Abdullah ibn Amr, who said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "The Kaaba will be destroyed by Dhu al-Suwayqatayn (the one with the two thin shins) from Abyssinia. He will strip it of its ornaments and denude it of its covering. And it is as if I am looking at him: a bald-headed man with deformed joints, striking it with his shovel and his pickaxe."