Ecclesiastes 8:7

And why? A man knoweth not what is for to come: for who will tell him?

Ecclesiastes 6:12

For who knoweth what is good for man living, in the days of his vain life, which is but a shadow? Or, who will tell a man what shall happen after him under the Sun?

Ecclesiastes 9:12

For man knoweth not his time, but like as the fish are taken with the angle and as the birds are caught with the snare: Even so are men taken in the perilous time, when it cometh suddenly upon them.

Proverbs 24:22

For their destruction shall come suddenly, and who knoweth the fall of them both?

Ecclesiastes 10:14

A fool is so full of words, that a man cannot tell what end he shall make. Who will then warn him of it that shall follow after him?

Proverbs 29:1

He that is stiff necked and will not be reformed, shall suddenly be destroyed without any help.

Ecclesiastes 3:22

Wherefore I perceive, that there is nothing better for a man, than to be joyful in his labour, for that is his portion. But who will bring him to see the thing that shall come after him?

Matthew 24:44

Therefore be ye also ready, for in the hour ye think least on, in the same ye think he would not: will the son of man come.

Matthew 24:50

that servant's master will come in a day when he looketh not for him: and in a hour that he is not aware of,

Matthew 25:6-13

And even at midnight, there was a cry made, 'Behold, the bridegroom cometh, go out against him.'

1 Thessalonians 5:1-3

Of the times and seasons brethren ye have no need that I write unto 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

Ecclesiastes 6:12
For who knoweth what is good for man living, in the days of his vain life, which is but a shadow? Or, who will tell a man what shall happen after him under the Sun?
Ecclesiastes 9:12
For man knoweth not his time, but like as the fish are taken with the angle and as the birds are caught with the snare: Even so are men taken in the perilous time, when it cometh suddenly upon them.
Ecclesiastes 10:14
A fool is so full of words, that a man cannot tell what end he shall make. Who will then warn him of it that shall follow after him?
Proverbs 24:22
For their destruction shall come suddenly, and who knoweth the fall of them both?
Proverbs 29:1
He that is stiff necked and will not be reformed, shall suddenly be destroyed without any help.
Matthew 24:44
Therefore be ye also ready, for in the hour ye think least on, in the same ye think he would not: will the son of man come.
Matthew 25:6
And even at midnight, there was a cry made, 'Behold, the bridegroom cometh, go out against him.'
1 Thessalonians 5:1
Of the times and seasons brethren ye have no need that I write unto you: