Mark 13:1-4

As Jesus was leaving the Temple, one of his followers said to him, “Look, Teacher! How beautiful the buildings are! How big the stones are!” Jesus said, “Do you see all these great buildings? Not one stone will be left on another. Every stone will be thrown down to the ground.” Later, as Jesus was sitting on the Mount of Olives, opposite the Temple, he was alone with Peter, James, John, and Andrew. They asked Jesus, “Tell us, when will these things happen? And what will be the sign that they are going to happen?”