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Repent! For the Kingdom of God is at hand.
Mark 1
14 Now after that John was put in prison, Jesus came into Galilee, preaching the gospel of the kingdom of God,
15 And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel.

The day of judgment;
2Peter 3
7 But the heavens and the earth, which are now, by the same word are kept in store, reserved unto fire against the day of judgment and perdition of ungodly men.

The day of His Glorious arrival;
1Th 4:
16 For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first:

The day the thresher shall separate the wheat from the chaff;
Matthew 3
11 I indeed baptize you with water unto repentance. but he that cometh after me is mightier than I, whose shoes I am not worthy to bear: he shall baptize you with the Holy Ghost, and with fire:
12 Whose fan is in his hand, and he will throughly purge his floor, and gather his wheat into the garner; but he will burn up the chaff with unquenchable fire.

The day the angels from Heaven shall gather His elect from the four winds;
Mark 13
26 And then shall they see the Son of man coming in the clouds with great power and glory.
27 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.

The day the reapers shall reap the earth's harvest;
Rev 14:
15 And another angel came out of the temple, crying with a loud voice to him that sat on the cloud, Thrust in thy sickle, and reap: for the time is come for thee to reap; for the harvest of the earth is ripe.

The day of the final countdown;
Jhn 12:
48 He that rejecteth me, and receiveth not my words, hath one that judgeth him: the word that I have spoken, the same shall judge him in the last day.

The day the Lord shall recount His worthies;
Nah 2:
4 The chariots shall rage in the streets, they shall justle one against another in the broad ways: they shall seem like torches, they shall run like the lightnings.
5 He shall recount his worthies: they shall stumble in their walk; they shall make haste to the wall thereof, and the defence shall be prepared.

The day when a great shaking shall come upon the whole earth;
Eze 38:
19 For in my jealousy [and] in the fire of my wrath have I spoken, Surely in that day there shall be a great shaking in the land of Israel;
20 So that the fishes of the sea, and the fowls of the heaven, and the beasts of the field, and all creeping things that creep upon the earth, and all the men that [are] upon the face of the earth, shall shake at my presence, and the mountains shall be thrown down, and the steep places shall fall, and every wall shall fall to the ground.

The day the wicked shall wail and the righteous will rejoice;
Isa 66:
5 Hear the word of the LORD, ye that tremble at his word; Your brethren that hated you, that cast you out for my name's sake, said, Let the LORD be glorified: but he shall appear to your joy, and they shall be ashamed.

The day when everything shall be turned upside down;
Isa 24:
1 Behold, the LORD maketh the earth empty, and maketh it waste, and turneth it upside down, and scattereth abroad the inhabitants thereof.

The day the mountains shall be made low and the valleys lifted up.
Isaiah 40
3 The voice of him that crieth in the wilderness, Prepare ye the way of the LORD, make straight in the desert a highway for our God.
4 Every valley shall be exalted, and every mountain and hill shall be made low: and the crooked shall be made straight, and the rough places plain:
5 And the glory of the LORD shall be revealed, and all flesh shall see it together: for the mouth of the LORD hath spoken it

Repent! For the Kingdom of Heaven is at hand.
Mat 4:
17 From that time Jesus began to preach, and to say, Repent: for the kingdom of heaven is at hand.

Repent! Repent!