Mark 13:2-4

Jesus turned to them and said, “Take a good look at all these enormous buildings, for I’m telling you, there will not be one stone left upon another. It will all be leveled!” Later, while Jesus was sitting on the Mount of Olives, overlooking the temple, his disciples, Peter, Jacob, John, and Andrew, came to him privately where he was sitting and said, “Tell us, when will these things happen? And what supernatural sign should we expect to signal your coming and the completion of this age?”