Mark 13:31

29So ye in like manner, when ye shall see these things come to pass, know that it is nigh, even at the doors.

30Verily I say unto you, that this generation shall not pass, till all these things be done.

31Heaven and earth shall pass away: but my words shall not pass away.

32But of that day and that hour knoweth no man, no, not the angels which are in heaven, neither the Son, but the Father.

33Take ye heed, watch and pray: for ye know not when the time is.