Matthew 24:30-40

30 then will appear the sign of the Son of man in heaven, and then all the tribes of the earth will mourn, and they will see the Son of man coming on the clouds of heaven with power and great glory;
31 and he will send out his angels with a loud trumpet call, and they will gather his elect from the four winds, from one end of heaven to the other.
32 "From the fig tree learn its lesson: as soon as its branch becomes tender and puts forth its leaves, you know that summer is near.
33 So also, when you see all these things, you know that he is near, at the very gates.
34 Truly, I say to you, this generation will not pass away till all these things take place.
35 Heaven and earth will pass away, but my words will not pass away.
36 "But of that day and hour no one knows, not even the angels of heaven, nor the Son, but the Father only.
37 As were the days of Noah, so will be the coming of the Son of man.
38 For as in those days before the flood they were eating and drinking, marrying and giving in marriage, until the day when Noah entered the ark,
39 and they did not know until the flood came and swept them all away, so will be the coming of the Son of man.
40 Then two men will be in the field; one is taken and one is left.
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.