2 Peter 3:8-15

⁸But do not ignore this one fact, beloved, that with the Lord one day is like a thousand years, and a thousand years are like one day.
⁹The Lord is not slow about his promise, as some think of slowness, but is patient with you, not wanting any to perish, but all to come to repentance. ¹⁰But the day of the Lord will come like a thief, and then the heavens will pass away with a loud noise, and the elements will be dissolved with fire, and the earth and everything that is done on it will be disclosed.
¹¹Since all these things are to be dissolved in this way, what sort of persons ought you to be in leading lives of holiness and godliness, ¹²waiting for and hastening the coming of the day of God, because of which the heavens will be set ablaze and dissolved, and the elements will melt with fire? ¹³But, in accordance with his promise, we wait for new heavens and a new earth, where righteousness is at home. ¹⁴Therefore, beloved, while you are waiting for these things, strive to be found by him at peace, without spot or blemish; ¹⁵and regard the patience of our Lord as salvation. So also our beloved brother Paul wrote to you according to the wisdom given him,

Mark 13: 24-37

 ²⁴“But in those days, after that suffering,

the sun will be darkened,
and the moon will not give its light,
²⁵ and the stars will be falling from heaven,
and the powers in the heavens will be shaken.

²⁶Then they will see ‘the Son of Man coming in clouds’ with great power and glory. ²⁷Then he will send out the angels, and gather his elect from the four winds, from the ends of the earth to the ends of heaven.

²⁸“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. ²⁹So also, when you see these things taking place, you know that he is near, at the very gates. ³⁰Truly I tell you, this generation will not pass away until all these things have taken place. ³¹Heaven and earth will pass away, but my words will not pass away.

³²“But about that day or hour no one knows, neither the angels in heaven, nor the Son, but only the Father. ³³Beware, keep alert; for you do not know when the time will come. ³⁴It is like a man going on a journey, when he leaves home and puts his slaves in charge, each with his work, and commands the doorkeeper to be on the watch. ³⁵Therefore, keep awake—for you do not know when the master of the house will come, in the evening, or at midnight, or at cockcrow, or at dawn, ³⁶or else he may find you asleep when he comes suddenly. ³⁷And what I say to you I say to all: Keep awake.”