1 Thessalonians 5:2

2 for you know very well that the day of the Lord will come like a thief in the night.

Read 1 Thessalonians 5:2 Using Other Translations

For yourselves know perfectly that the day of the Lord so cometh as a thief in the night.
For you yourselves are fully aware that the day of the Lord will come like a thief in the night.
For you know quite well that the day of the Lord’s return will come unexpectedly, like a thief in the night.