Revelation 2:5

So keep in mind where you were at first, and be changed in heart and do the first works; or I will come to you, and will take away your light from its place, if your hearts are not changed.

Revelation 2:16

See, then, that you have a change of heart; or I will come to you quickly, and will make war against them with the sword of my mouth.

Revelation 3:19

To all those who are dear to me, I give sharp words and punishment: then with all your heart have sorrow for your evil ways.

Isaiah 1:26

And I will give you judges again as at the first, and wise guides as in the past; then you will be named, The Town of Righteousness, the true town.

Isaiah 14:12

How great is your fall from heaven, O shining one, son of the morning! How are you cut down to the earth, low among the dead bodies!

Jeremiah 2:2-3

Go and say in the ears of Jerusalem, The Lord says, I still keep the memory of your kind heart when you were young, and your love when you became my bride; how you went after me in the waste of sand, in an unplanted land.

Ezekiel 16:61-63

Then at the memory of your ways you will be overcome with shame, when I take your sisters, the older and the younger, and give them to you for daughters, but not by your agreement.

Ezekiel 20:43

And there, at the memory of your ways and of all the things you did to make yourselves unclean, you will have bitter hate for yourselves because of all the evil things you have done.

Ezekiel 36:31

And at the memory of your evil ways and your wrongdoings, you will have bitter hate for yourselves because of your evil-doings and your disgusting ways, O children of Israel.

Hosea 9:10

I made discovery of Israel as of grapes in the waste land; I saw your fathers as the first-fruits of the fig-tree in her early fruit time; but they came to Baal-peor, and made themselves holy to the thing of shame, and became disgusting like that to which they gave their love.

Hosea 14:1

O Israel, come back to the Lord your God; for your evil-doing has been the cause of your fall.

Malachi 3:4

Then the offering of Judah and Jerusalem will be pleasing to the Lord, as in days gone by, and as in past years.

Malachi 4:6

And by him the hearts of fathers will be turned to their children, and the hearts of children to their fathers; for fear that I may come and put the earth under a curse.

Matthew 21:41-43

They say to him, He will put those cruel men to a cruel death, and will let out the vine-garden to other workmen, who will give him the fruit when it is ready.

Matthew 24:48-51

But if that evil servant says in his heart, My lord is a long time in coming;

Mark 12:9

What then will the master of the garden do? He will come and put the workmen to death, and will give the garden into the hands of others.

Luke 1:17

And he will go before his face in the spirit and power of Elijah, turning the hearts of fathers to their children, and wrongdoers to the way of righteousness; to make ready a people whose hearts have been turned to the Lord.

Luke 12:45-46

But if that servant says to himself, My lord is a long time coming; and goes about giving blows to the men-servants and the women-servants, feasting and taking overmuch wine;

Luke 20:16

He will come and put them to destruction and give the garden to others. And when he said this, they said, May it not be so.

Acts 17:30-31

Those times when men had no knowledge were overlooked by God; but now he gives orders to all men in every place to undergo a change of heart:

Galatians 5:4

You are cut off from Christ, you who would have righteousness by the law; you are turned away from grace.

Hebrews 10:32

But give thought to the days after you had seen the light, when you went through a great war of troubles;

2 Peter 1:12-13

For this reason I will be ready at all times to keep your memory of these things awake, though you have the knowledge of them now and are well based in your present faith.

Jude 1:24

Now to him who is able to keep you from falling, and to give you a place in his glory, free from all evil, with great joy,

Revelation 1:20

The secret of the seven stars which you saw in my right hand, and of the seven gold vessels with burning lights. The seven stars are the angels of the seven churches: and the seven lights are the seven churches.

Revelation 2:2

I have knowledge of your doings, and of your hard work and long waiting, and that you will not put up with evil men, and have put to the test those who say they are Apostles and are not, and have seen that they are false;

Revelation 2:19

I have knowledge of your works, and your love and faith and help and strength in trouble, and that your last works are more than the first.

Revelation 2:21-22

And I gave her time for a change of heart, but she has no mind to give up her unclean ways.

Revelation 3:2-3

Be on the watch, and make strong the rest of the things which are near to death; because as judged by me your works have not come up to God's measure.

Revelation 9:20-21

And the rest of the people, who were not put to death by these evils, were not turned from the works of their hands, but went on giving worship to evil spirits, and images of gold and silver and brass and stone and wood which have no power of seeing or hearing or walking:

Revelation 16:9

And men were burned with great heat: and they said evil things against the name of the God who has authority over these punishments; and they were not turned from their evil ways to give him glory.

Treasury of Scripture Knowledge

Summary

Remember therefore from whence thou art fallen, and repent, and do the first works; or else I will come unto thee quickly, and will remove thy candlestick out of his place, except thou repent.

Bible References

Remember

Revelation 3:3
Keep in mind, then, the teaching which was given to you, and be ruled by it and have a change of heart. If then you do not keep watch, I will come like a thief, and you will have no knowledge of the hour when I will come on you.
Ezekiel 16:61
Then at the memory of your ways you will be overcome with shame, when I take your sisters, the older and the younger, and give them to you for daughters, but not by your agreement.
Ezekiel 20:43
And there, at the memory of your ways and of all the things you did to make yourselves unclean, you will have bitter hate for yourselves because of all the evil things you have done.
Ezekiel 36:31
And at the memory of your evil ways and your wrongdoings, you will have bitter hate for yourselves because of your evil-doings and your disgusting ways, O children of Israel.
2 Peter 1:12
For this reason I will be ready at all times to keep your memory of these things awake, though you have the knowledge of them now and are well based in your present faith.

Thou art

Isaiah 14:12
How great is your fall from heaven, O shining one, son of the morning! How are you cut down to the earth, low among the dead bodies!
Hosea 14:1
O Israel, come back to the Lord your God; for your evil-doing has been the cause of your fall.
Galatians 5:4
You are cut off from Christ, you who would have righteousness by the law; you are turned away from grace.
Jude 1:24
Now to him who is able to keep you from falling, and to give you a place in his glory, free from all evil, with great joy,

And repent

Revelation 2:16
See, then, that you have a change of heart; or I will come to you quickly, and will make war against them with the sword of my mouth.
Revelation 3:3
Keep in mind, then, the teaching which was given to you, and be ruled by it and have a change of heart. If then you do not keep watch, I will come like a thief, and you will have no knowledge of the hour when I will come on you.
Revelation 9:20
And the rest of the people, who were not put to death by these evils, were not turned from the works of their hands, but went on giving worship to evil spirits, and images of gold and silver and brass and stone and wood which have no power of seeing or hearing or walking:
Revelation 16:9
And men were burned with great heat: and they said evil things against the name of the God who has authority over these punishments; and they were not turned from their evil ways to give him glory.
Acts 17:30
Those times when men had no knowledge were overlooked by God; but now he gives orders to all men in every place to undergo a change of heart:

And do

Revelation 2:19
I have knowledge of your works, and your love and faith and help and strength in trouble, and that your last works are more than the first.
Revelation 3:2
Be on the watch, and make strong the rest of the things which are near to death; because as judged by me your works have not come up to God's measure.
Isaiah 1:26
And I will give you judges again as at the first, and wise guides as in the past; then you will be named, The Town of Righteousness, the true town.
Jeremiah 2:2
Go and say in the ears of Jerusalem, The Lord says, I still keep the memory of your kind heart when you were young, and your love when you became my bride; how you went after me in the waste of sand, in an unplanted land.
Hosea 9:10
I made discovery of Israel as of grapes in the waste land; I saw your fathers as the first-fruits of the fig-tree in her early fruit time; but they came to Baal-peor, and made themselves holy to the thing of shame, and became disgusting like that to which they gave their love.
Malachi 3:4
Then the offering of Judah and Jerusalem will be pleasing to the Lord, as in days gone by, and as in past years.
Malachi 4:6
And by him the hearts of fathers will be turned to their children, and the hearts of children to their fathers; for fear that I may come and put the earth under a curse.
Luke 1:17
And he will go before his face in the spirit and power of Elijah, turning the hearts of fathers to their children, and wrongdoers to the way of righteousness; to make ready a people whose hearts have been turned to the Lord.

Else

Revelation 2:16
See, then, that you have a change of heart; or I will come to you quickly, and will make war against them with the sword of my mouth.
Revelation 3:3
Keep in mind, then, the teaching which was given to you, and be ruled by it and have a change of heart. If then you do not keep watch, I will come like a thief, and you will have no knowledge of the hour when I will come on you.
Matthew 21:41
They say to him, He will put those cruel men to a cruel death, and will let out the vine-garden to other workmen, who will give him the fruit when it is ready.
Matthew 24:48
But if that evil servant says in his heart, My lord is a long time in coming;
Mark 12:9
What then will the master of the garden do? He will come and put the workmen to death, and will give the garden into the hands of others.
Luke 12:45
But if that servant says to himself, My lord is a long time coming; and goes about giving blows to the men-servants and the women-servants, feasting and taking overmuch wine;
Luke 20:16
He will come and put them to destruction and give the garden to others. And when he said this, they said, May it not be so.

General references

Exodus 40:24
The support for the lights he put in the Tent of meeting, opposite the table, on the south side:
Matthew 25:7
Then all those virgins got up, and made ready their lights.
1 Corinthians 11:31
But if we were true judges of ourselves, punishment would not come on us.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain