Matthew 24:39

and knew nothing about it until the Flood came and swept them all away, so it will be at the coming of the Son of Man.

Matthew 24:50

the master of that slave will come on the very day he is not expecting him,

1 Thessalonians 5:1-3

But as to times and dates, brothers, you have no need of anyone's writing you,

2 Peter 2:3

In their greed they will exploit you with messages manufactured by themselves. From of old their condemnation has not been idle and their destruction has not been slumbering.

Treasury of Scripture Knowledge

Summary

And it came to pass, when the king of Ai saw it, that they hasted and rose up early, and the men of the city went out against Israel to battle, he and all his people, at a time appointed, before the plain; but he wist not that there were liers in ambush against him behind the city.

Bible References

He wist not

Matthew 24:39
and knew nothing about it until the Flood came and swept them all away, so it will be at the coming of the Son of Man.
1 Thessalonians 5:1
But as to times and dates, brothers, you have no need of anyone's writing you,
2 Peter 2:3
In their greed they will exploit you with messages manufactured by themselves. From of old their condemnation has not been idle and their destruction has not been slumbering.