Revelation 3:3

Remember, therefore, how you have received and heard, and be watchful and repent. If, therefore, you do not watch, I will come upon you as a thief, and you shall not know at what hour I will come upon you.

Revelation 2:5

Remember, therefore, whence you have fallen, and repent, and do your first works; if not, I will come to you quickly, and I will remove your candlestick from its place, unless you repent.

2 Peter 3:10

But the day of the Lord will come as a thief, in which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, and the earth, and the works that are on it, shall be burned up.

1 Thessalonians 5:2

for you yourselves know perfectly that the day of the Lord so comes as a thief in the night:

Revelation 16:15

Behold, I come as a thief: blessed is he that watches, and keeps his garments, that he may not walk naked, and that men may not see his nakedness.

Matthew 25:13

Watch, therefore, for you know neither the day nor the hour.

2 Timothy 1:13

Hold fast the form of sound words which you have heard from me, in faithfulness and in love which is in Christ Jesus.

Matthew 24:42-43

"Watch, therefore, for you know not at what hour your Lord is coming.

Mark 13:33

Take heed, watch and pray: for you know not when the time is.

Mark 13:36

lest he come suddenly, and find you sleeping.

Luke 12:39-40

But know this, that if the master of the house had known at what hour the thief comes, he would have watched, and would not have suffered his house to be broken through.

1 Thessalonians 5:4-6

But you, brethren, are not in darkness, that that day should overtake you as a thief.

1 Timothy 6:20

Timothy, keep that which is committed to your charge, avoiding those profane and empty babblings, and disputations about knowledge falsely so called;

Hebrews 2:1

Therefore, we ought to give the more earnest heed to the things which we have heard, lest we let them glide away.

2 Peter 1:13

Indeed, I think it right, as long as I am in this tabernacle, to arouse you by putting you in remembrance.

2 Peter 3:1

This second letter I now write to you, beloved; in both of these I arouse your pure mind to remembrance,

Revelation 2:21-22

And I have given her time to repent; and she will not repent of her lewdness.

Revelation 2:25

but what you have, hold fast till I come.

Revelation 3:11

I come quickly: hold fast that which you have, that no one take your crown.

Revelation 3:19

As many as I love, I rebuke and chasten; be zealous, therefore, and repent.

Treasury of Scripture Knowledge

Summary

Remember therefore how thou hast received and heard, and hold fast, and repent. If therefore thou shalt not watch, I will come on thee as a thief, and thou shalt not know what hour I will come upon thee.

Bible References

Remember

Revelation 2:5
Remember, therefore, whence you have fallen, and repent, and do your first works; if not, I will come to you quickly, and I will remove your candlestick from its place, unless you repent.
Hebrews 2:1
Therefore, we ought to give the more earnest heed to the things which we have heard, lest we let them glide away.
2 Peter 1:13
Indeed, I think it right, as long as I am in this tabernacle, to arouse you by putting you in remembrance.
2 Peter 3:1
This second letter I now write to you, beloved; in both of these I arouse your pure mind to remembrance,

And hold

Revelation 3:11
I come quickly: hold fast that which you have, that no one take your crown.
Revelation 2:25
but what you have, hold fast till I come.
1 Timothy 6:20
Timothy, keep that which is committed to your charge, avoiding those profane and empty babblings, and disputations about knowledge falsely so called;
2 Timothy 1:13
Hold fast the form of sound words which you have heard from me, in faithfulness and in love which is in Christ Jesus.

I will

Revelation 16:15
Behold, I come as a thief: blessed is he that watches, and keeps his garments, that he may not walk naked, and that men may not see his nakedness.
Matthew 24:42
"Watch, therefore, for you know not at what hour your Lord is coming.
Luke 12:39
But know this, that if the master of the house had known at what hour the thief comes, he would have watched, and would not have suffered his house to be broken through.
1 Thessalonians 5:2
for you yourselves know perfectly that the day of the Lord so comes as a thief in the night:
2 Peter 3:10
But the day of the Lord will come as a thief, in which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, and the earth, and the works that are on it, shall be burned up.

Know

Matthew 25:13
Watch, therefore, for you know neither the day nor the hour.
Mark 13:33
Take heed, watch and pray: for you know not when the time is.

General references

Matthew 24:36
But of that day and hour no one knows, not the angels of heaven, but my Father only.
Luke 12:39
But know this, that if the master of the house had known at what hour the thief comes, he would have watched, and would not have suffered his house to be broken through.
1 Corinthians 11:31
For if we would judge ourselves, we should not be judged;