1 Thessalonians 5:2

Αὐτοὶ γὰρ ἀκριβῶς οἴδατε ὅτι ἡ ἡμέρα Κυρίου ὡς κλέπτης ἐν νυκτὶ οὕτως ἔρχεται·

Aytoi gar akribōs oidate oti ē ēmera Kyrioy ōs kleptēs en nykti oytōs erchetai·

King James Version (KJV)

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

Modern English

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