Revelation 3:3

Remember, therefore, how you have received, and did hear; and keep it, and repent. If, therefore, you do not watch, I will come 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; or else I am coming to you, and will remove your candlestick out of its place, if you do not repent.

2 Peter 3:10

But the day of the Lord will come as a thief, in which the heavens will pass away with a rushing noise, and the elements, being intensely hot, shall be dissolved, and the earth and the works therein shall be burned up.

1 Thessalonians 5:2

for ye yourselves know accurately that the day of the Lord so comes as a thief at night.

Revelation 16:15

"Behold, I come as a thief! Happy is he that is watching, and keeping his garments; that he walk not naked, and they see his shame."

Matthew 25:13

Watch, therefore, because ye know not the day, nor the hour!

2 Timothy 1:13

Hold the pattern of healthful words which you heard from me, in faith and love which is in Christ Jesus.

Matthew 24:42-43

Watch ye, therefore, because ye know not in what day your Lord is coming.

Mark 13:33

Take heed, watch [and pray]; for ye know not when the time is.

Mark 13:36

lest, coming suddenly, he find you sleeping.

Luke 12:39-40

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

1 Thessalonians 5:4-6

But ye, brethren, are not in darkness, that the day should overtake you as a thief;

1 Timothy 6:20

O Timothy, guard the deposit; turning away from the profane babblings, and oppositions of that which is falsely called knowledge;

Hebrews 2:1

For this reason, it is needful that we give the more earnest heed to the things heard, lest at any time we drift past them.

2 Peter 1:13

And I think it right, as long as I am in this tabernacle, to stir you up by reminding you;

2 Peter 3:1

This, a second letter, beloved, I now write to you, in both which I stir up your sincere mind by way of remembrance;

Revelation 2:21-22

And I gave her time, that she might repent; and she is not willing to repent of her fornication.

Revelation 2:25

nevertheless, that which ye have, hold fast till I come.

Revelation 3:11

I am coming speedily; hold fast that which you have, that no one take your crown.

Revelation 3:19

As many as I love, I reprove 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; or else I am coming to you, and will remove your candlestick out of its place, if you do not repent.
Hebrews 2:1
For this reason, it is needful that we give the more earnest heed to the things heard, lest at any time we drift past them.
2 Peter 1:13
And I think it right, as long as I am in this tabernacle, to stir you up by reminding you;
2 Peter 3:1
This, a second letter, beloved, I now write to you, in both which I stir up your sincere mind by way of remembrance;

And hold

Revelation 3:11
I am coming speedily; hold fast that which you have, that no one take your crown.
Revelation 2:25
nevertheless, that which ye have, hold fast till I come.
1 Timothy 6:20
O Timothy, guard the deposit; turning away from the profane babblings, and oppositions of that which is falsely called knowledge;
2 Timothy 1:13
Hold the pattern of healthful words which you heard from me, in faith and love which is in Christ Jesus.

I will

Revelation 16:15
"Behold, I come as a thief! Happy is he that is watching, and keeping his garments; that he walk not naked, and they see his shame."
Matthew 24:42
Watch ye, therefore, because ye know not in what day your Lord is coming.
Luke 12:39
But know this, that, if the householder had known at what hour the thief was coming, he would have watched, and not have suffered his house to be broken through.
1 Thessalonians 5:2
for ye yourselves know accurately that the day of the Lord so comes as a thief at night.
2 Peter 3:10
But the day of the Lord will come as a thief, in which the heavens will pass away with a rushing noise, and the elements, being intensely hot, shall be dissolved, and the earth and the works therein shall be burned up.

Know

Matthew 25:13
Watch, therefore, because ye know not the day, nor the hour!
Mark 13:33
Take heed, watch [and pray]; for ye know not when the time is.

General references

Matthew 24:36
But concerning that day and hour, no one knows, not even the angels of Heaven, neither the Son, but the Father only.
Luke 12:39
But know this, that, if the householder had known at what hour the thief was coming, he would have watched, and not have suffered his house to be broken through.
1 Corinthians 11:31
But, if we discerned ourselves, we would not be judged;