This is now the second letter that I am writing to you, beloved. In both of them I am stirring up your sincere mind by way of reminder,  that you should remember the predictions of the holy prophets and the commandment of the Lord and Savior through your apostles,  knowing this first of all, that scoffers will come in the last days with scoffing, following their own sinful desires.  They will say, “Where is the promise of his coming? For ever since the fathers fell asleep, all things are continuing as they were from the beginning of creation.”  For they deliberately overlook this fact, that the heavens existed long ago, and the earth was formed out of water and through water by the word of God,  and that by means of these the world that then existed was deluged with water and perished.  But by the same word the heavens and earth that now exist are stored up for fire, being kept until the day of judgment and destruction of the ungodly.
 But do not overlook this one fact, beloved, that with the Lord one day is as a thousand years, and a thousand years as one day.  The Lord is not slow to fulfill his promise as some count slowness, but is patient toward you, not wishing that any should perish, but that all should reach repentance.  But the day of the Lord will come like a thief, and then the heavens will pass away with a roar, and the heavenly bodies will be burned up and dissolved, and the earth and the works that are done on it will be exposed.
 Since all these things are thus to be dissolved, what sort of people ought you to be in lives of holiness and godliness,  waiting for and hastening the coming of the day of God, because of which the heavens will be set on fire and dissolved, and the heavenly bodies will melt as they burn!  But according to his promise we are waiting for new heavens and a new earth in which righteousness dwells.
 Therefore, beloved, since you are waiting for these, be diligent to be found by him without spot or blemish, and at peace.  And count the patience of our Lord as salvation, just as our beloved brother Paul also wrote to you according to the wisdom given him,  as he does in all his letters when he speaks in them of these matters. There are some things in them that are hard to understand, which the ignorant and unstable twist to their own destruction, as they do the other Scriptures.  You therefore, beloved, knowing this beforehand, take care that you are not carried away with the error of lawless people and lose your own stability.  But grow in the grace and knowledge of our Lord and Savior Jesus Christ. To him be the glory both now and to the day of eternity. Amen.
(2 Peter 3 ESV)
 And while some were speaking of the temple, how it was adorned with noble stones and offerings, he said,  “As for these things that you see, the days will come when there will not be left here one stone upon another that will not be thrown down.”  And they asked him, “Teacher, when will these things be, and what will be the sign when these things are about to take place?”  And he said, “See that you are not led astray. For many will come in my name, saying, ‘I am he!’ and, ‘The time is at hand!’ Do not go after them.  And when you hear of wars and tumults, do not be terrified, for these things must first take place, but the end will not be at once.”
 Then he said to them, “Nation will rise against nation, and kingdom against kingdom.  There will be great earthquakes, and in various places famines and pestilences. And there will be terrors and great signs from heaven.  But before all this they will lay their hands on you and persecute you, delivering you up to the synagogues and prisons, and you will be brought before kings and governors for my name's sake.  This will be your opportunity to bear witness.  Settle it therefore in your minds not to meditate beforehand how to answer,  for I will give you a mouth and wisdom, which none of your adversaries will be able to withstand or contradict.  You will be delivered up even by parents and brothers and relatives and friends, and some of you they will put to death.  You will be hated by all for my name's sake.  But not a hair of your head will perish.  By your endurance you will gain your lives.
 “But when you see Jerusalem surrounded by armies, then know that its desolation has come near.  Then let those who are in Judea flee to the mountains, and let those who are inside the city depart, and let not those who are out in the country enter it,  for these are days of vengeance, to fulfill all that is written.  Alas for women who are pregnant and for those who are nursing infants in those days! For there will be great distress upon the earth and wrath against this people.  They will fall by the edge of the sword and be led captive among all nations, and Jerusalem will be trampled underfoot by the Gentiles, until the times of the Gentiles are fulfilled.
 “And there will be signs in sun and moon and stars, and on the earth distress of nations in perplexity because of the roaring of the sea and the waves,  people fainting with fear and with foreboding of what is coming on the world. For the powers of the heavens will be shaken.  And then they will see the Son of Man coming in a cloud with power and great glory.  Now when these things begin to take place, straighten up and raise your heads, because your redemption is drawing near.”
 And he told them a parable: “Look at the fig tree, and all the trees.  As soon as they come out in leaf, you see for yourselves and know that the summer is already near.  So also, when you see these things taking place, you know that the kingdom of God is near.  Truly, I say to you, this generation will not pass away until all has taken place.  Heaven and earth will pass away, but my words will not pass away.
 “But watch yourselves lest your hearts be weighed down with dissipation and drunkenness and cares of this life, and that day come upon you suddenly like a trap.  For it will come upon all who dwell on the face of the whole earth.  But stay awake at all times, praying that you may have strength to escape all these things that are going to take place, and to stand before the Son of Man.”
 And every day he was teaching in the temple, but at night he went out and lodged on the mount called Olivet.  And early in the morning all the people came to him in the temple to hear him.
(Luke 21:5-38 ESV)