Matthew 24:44

So you, too, must continue to be ready, for at an hour you are not expecting Him the Son of Man will come.

Matthew 24:50

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

Matthew 25:6-13

But at midnight there was a shout, 'Here comes the bridegroom! Go out to meet him!'

1 Thessalonians 5:1-3

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

Treasury of Scripture Knowledge

Summary

For he knoweth not that which shall be: for who can tell him when it shall be?

Bible References

He knoweth

Matthew 24:44
So you, too, must continue to be ready, for at an hour you are not expecting Him the Son of Man will come.
Matthew 25:6
But at midnight there was a shout, 'Here comes the bridegroom! Go out to meet him!'
1 Thessalonians 5:1
But as to times and dates, brothers, you have no need of anyone's writing you,