1 Thessalonians 5:2

For, ye yourselves, perfectly well know - that, the day of the Lord, as a thief in the night, so, cometh;

2 Peter 3:10

Howbeit the day of the Lord will be here, as a thief, - in which, the heavens, with a rushing noise, will pass away, while, elements, becoming intensely hot, will be dissolved, and, earth, and the works therein, will be discovered.

Revelation 3:3

Remember, therefore, how thou hast received, and didst hear, and keep it and repent. If then thou shall not watch, I will have come as a thief, and in nowise shalt thou get to know, during what sort of hour, I will have come upon thee.

Revelation 16:15

Lo! I come as a thief! Happy, he that is watching, and keeping his garments, lest, naked, he be walking, and they see his shame. -

Matthew 24:42-44

Be watching, therefore, for ye know not, on what manner of day, your Lord is coming.

Matthew 25:13

Be watching, therefore, because ye know, neither the day nor the hour.

Mark 13:34-35

As a man from home - having left his house, and given his servants the authority, to each one, his work, - and, unto the porter, hath given command, that he should watch: -

Luke 12:39-40

But, of this, be taking note - Had the householder known, in what hour the thief was coming, he would have watched, and not suffered his house, to be digged through.

Jeremiah 23:20

The anger of Yahweh, wilt not return, Until he hath executed nor Until he hath established The purposes of his heart, - In the afterpart of the days, shall ye understand it perfectly.

1 Corinthians 1:8

Who will also confirm you unto the end, unaccusable in the day of our Lord Jesus Christ:

Treasury of Scripture Knowledge

Summary

For yourselves know perfectly that the day of the Lord so cometh as a thief in the night.

General references

Bible References

Know

Jeremiah 23:20
The anger of Yahweh, wilt not return, Until he hath executed nor Until he hath established The purposes of his heart, - In the afterpart of the days, shall ye understand it perfectly.

General references

Matthew 24:36
But, concerning that day and hour, no one, knoweth, neither the messengers of the heavens, nor the Son, - save the Father only.
Luke 12:39
But, of this, be taking note - Had the householder known, in what hour the thief was coming, he would have watched, and not suffered his house, to be digged through.
Luke 17:27
They were eating, they were drinking, they were marrying, they were being given in marriage, - until the day that Noah entered into the ark, and the flood came, and destroyed them all.