Mark 13:28

We have here the application of this prophetical sermon; now learn to look forward in a right manner. I. "As to the destruction of Jerusalem, expect it to come very shortly; as when the branch of the fig-tree becomes soft, and the leaves sprout forth, ye expect that summer will come shortly, Mar 13:28. When second causes begin to work, ye expect their effects in their proper order and time. So when ye see these things come to pass, when ye see the Jewish nation embroiled in wars, distracted by false Christs and prophets, and drawing upon them the displeasure of the Romans, especially when ye see them persecuting you for your Master's sake, and thereby standing to what they did when they put him to death, and repeating it, and so filling up the measure of their iniquity, then say that their ruin is nigh, even at the door, and provide for yourselves accordingly." The disciples themselves were indeed all of them, except John, taken away from the evil to come, but the next generation whom they were to train up, would live to see it; and by these instructions which Christ left behind him would be kept from sharing in it; "This generation that is now rising up, shall not all be worn off before all these things come to pass, which I have told you of, relating to Jerusalem, and they shall begin to take effect now shortly.

— Matthew Henry's Concise Commentary (public domain)