Matthew 24:44

Therefore be ye also ready: because the Son of man cometh in an hour at which you do not think.

Matthew 24:50

the lord of that servant will come in a day in which he does not expect, and an hour in which he does not know,

Matthew 25:6-13

And at midnight there was a cry made, Behold, the bridegroom! go ye out to meet him.

1 Thessalonians 5:1-3

But concerning the times and seasons, brethren, you have no need that I write to 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
Therefore be ye also ready: because the Son of man cometh in an hour at which you do not think.
Matthew 25:6
And at midnight there was a cry made, Behold, the bridegroom! go ye out to meet him.
1 Thessalonians 5:1
But concerning the times and seasons, brethren, you have no need that I write to you;