Revelation 14:14-20

I looked, and there before me was a white cloud, and seated on the cloud was one "like a Son of Man" with a crown of gold on His head and a sharp sickle in His hand.  Then another angel came out of the temple and called in a loud voice to Him who was sitting on the cloud, "Take your sickle and reap, because the time to reap has come, for the harvest of the earth is ripe."  So He who was seated on the cloud swung His sickle over the earth, and the earth was harvested.

Another angel came out of the temple in heaven, and he too had a sharp sickle.  Still another angel, who had charge of the fire, came from the altar and called in a loud voice to him who had the sharp sickle, "Take your sharp sickle and gather the clusters of grapes from the earth's vine, because its grapes are ripe."  The angel swung his sickle on the earth, gathered its grapes and threw them into the great winepress of God's wrath.  They were trampled in the winepress outside the city, and blood flowed out of the press, rising as high as the horses' bridles for a distance of 1,600 stadia. (About 180 miles.)

"No one knows about that day or hour, not even the angels in heaven, nor the Son, but only the Father.  As it was in the days of Noah, so it will be at the coming of the Son of Man.   For in the days before the flood, people were eating and drinking, marrying and giving in marriage, up to the day Noah entered the ark; and they knew nothing about what would happen until the flood came and took them all away.   That is how it will be at the coming of the Son of Man.  Two men will be in the field; one will be taken and the other left.   Two women will be grinding with a hand mill; one will be taken and the other left.  Matthew 24:36-41

2 Peter 3:3-18

First of all, you must understand that in the last days scoffers will come, scoffing and following their own evil desires.  They will say, "Where is this 'coming' He promised?  Ever since our fathers died, everything goes on as it has since the beginning of creation."  But they deliberately forget that long ago by God's word the heavens existed and the earth was formed out of water and by water.  By these waters also the world of that time was deluged and destroyed.  By the same word the present heavens and earth are reserved for fire, being kept for the Day of Judgment and destruction of ungodly men.

But do not forget this one thing, dear friends:  With the Lord a day is like a thousand years, and a thousand years are like a day.  The Lord is not slow in keeping His promise, as some understand slowness.  He is patient with you, not wanting anyone to perish, but everyone to come to repentance.

But the day of the Lord will come like a thief.  The heavens will disappear with a roar; the elements will be destroyed by fire, and the earth and everything in it will be laid bare.

Since everything will be destroyed in this way, what kind of people ought you to be?  You ought to live holy and godly lives as you look forward to the day of God and speed its coming.  That day will bring about the destruction of the heavens by fire, and the elements will melt in the heat.  But in keeping with His promise we are looking forward to a new heaven and a new earth, the home of righteousness.

So then, dear friends, since you are looking forward to this, make every effort to be found spotless, blameless and at peace with Him. Bear in mind that our Lord's patience means salvation, just as our dear brother Paul also wrote you with the wisdom that God gave him.  He writes the same way in all his letters, speaking in them of these matters.  His letters contain some things that are hard to understand, which ignorant and unstable people distort, as they do the other Scriptures, to their own destruction.