Luke 12:40

Be you also ready, for at an hour when you are not expecting Him the Son of Man will come."

Matthew 24:42

Be on the alert therefore, for you do not know the day on which your Lord is coming.

Matthew 24:44

Therefore you also must be ready; for it is at a time when you do not expect Him that the Son of Man will come.

Matthew 25:13

"Keep awake therefore; for you know neither the day nor the hour.

Mark 13:33-36

Take care, be on the alert, and pray; for you do not know when it will happen.

Luke 21:34-36

"But take heed to yourselves, lest your souls be weighed down with self-indulgence and drunkenness or the anxieties of this life, and that day come upon you, suddenly, like a falling trap;

Romans 13:11

Carry out these injunctions because you know the critical period at which we are living, and that it is now high time, to rouse yourselves from sleep; for salvation is now nearer to us than when we first became believers.

Romans 13:14

On the contrary, clothe yourselves with the Lord Jesus Christ, and make no provision for gratifying your earthly cravings.

1 Thessalonians 5:6

So then let us not sleep, like the rest of the world, but let us keep awake and be sober.

2 Peter 3:12-14

eagerly looking forward to the coming of the day of God, by reason of which the heavens, all ablaze, will be destroyed, and the elements will melt in the fierce heat?

Revelation 19:7

Let us rejoice and triumph and give Him the glory; for the time for the marriage of the Lamb has come, and His Bride has made herself ready."

Treasury of Scripture Knowledge

Summary

Be ye therefore ready also: for the Son of man cometh at an hour when ye think not.

Bible References

General references

Luke 21:34
"But take heed to yourselves, lest your souls be weighed down with self-indulgence and drunkenness or the anxieties of this life, and that day come upon you, suddenly, like a falling trap;
Matthew 24:42
Be on the alert therefore, for you do not know the day on which your Lord is coming.
Matthew 25:13
"Keep awake therefore; for you know neither the day nor the hour.
Mark 13:33
Take care, be on the alert, and pray; for you do not know when it will happen.
Romans 13:11
Carry out these injunctions because you know the critical period at which we are living, and that it is now high time, to rouse yourselves from sleep; for salvation is now nearer to us than when we first became believers.
1 Thessalonians 5:6
So then let us not sleep, like the rest of the world, but let us keep awake and be sober.
2 Peter 3:12
eagerly looking forward to the coming of the day of God, by reason of which the heavens, all ablaze, will be destroyed, and the elements will melt in the fierce heat?
Revelation 19:7
Let us rejoice and triumph and give Him the glory; for the time for the marriage of the Lamb has come, and His Bride has made herself ready."