Matthew 24:33-36
33 (NIV) Even so, when you see all these things, you know that it is near, right at the door. 34 I tell you the truth, this generation will certainly not pass away until all these things have happened. 35 Heaven and earth will pass away, but my words will never pass away. 36 No one knows about that day or hour, not even the angels in heaven, nor the Son, but only the Father.