Matthew 24:33-37
33So likewise ye, when ye shall see all these things, know that it is near, even at the doors.
34Verily I say unto you, This generation shall not pass, till all these things be fulfilled.
35Heaven and earth shall pass away, but my words shall not pass away.
36But of that day and hour knoweth no man, no, not the angels of heaven, but my Father only.
37But as the days of Noe were, so shall also the coming of the Son of man be.
(KJV)