Mark 13:29-33

So also, when you observe all these things progressively taking place, you will know that he is near, even at the door! I assure you, this family will not pass away until all I have spoken comes to pass. The earth and sky will wear out and fade away before one word I speak loses its power or fails to accomplish its purpose.” “Concerning that day and exact hour, no one knows when it will arrive, not the angels of heaven, not even the Son—only the Father knows. This is why you must be waiting, watching and praying, because no one knows when that season of time will come.”