Mark 13:27-31

And then shall he send his angels, and shall gather together his elect from the four winds, from the uttermost part of the earth to the uttermost part of heaven.

Now learn a parable of the fig tree; When her branch is yet tender, and putteth forth leaves, ye know that summer is near:

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

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

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