Matthew 24:39

and knew not till the flood came and took them all away, so shall the coming of the Son of man be.

Matthew 24:50

the Lord of that servant will come on a day when he looks not for him, and at an hour that he knows not of,

Matthew 25:6

but at midnight there was a cry, Behold the bridegroom; go out to meet him.

1 Thessalonians 5:2

for you yourselves know perfectly that the day of the Lord comes like 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 crash, and the elements be melted with heat, and the earth and the works in it be consumed.

Treasury of Scripture Knowledge

Summary

So Joshua arose, and all the people of war, to go up against Ai: and Joshua chose out thirty thousand mighty men of valour, and sent them away by night.

Bible References

By night

Matthew 24:39
and knew not till the flood came and took them all away, so shall the coming of the Son of man be.
Matthew 25:6
but at midnight there was a cry, Behold the bridegroom; go out to meet him.
1 Thessalonians 5:2
for you yourselves know perfectly that the day of the Lord comes like 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 crash, and the elements be melted with heat, and the earth and the works in it be consumed.