Musannaf Ibn Abi Shayba 37:124

Ghundar narrated to us, from Shu'bah, from Ya'la ibn 'Ata, from his father, who said: I was holding the bridle of the mount of 'Abdullah ibn 'Amr. He said: "How will you be when you demolish the House (the Ka'bah), not leaving stone upon stone?" They said: "And we are upon Islam?" He said: "And you are upon Islam." He said: "Then what?" He said: "Then it will be rebuilt better than it was. So if you see that Makkah has had its tunnels opened (or its ground broken through with channels), and you see the buildings rising above the tops of the mountains, then know that the matter has overshadowed you."