Matthew 24:42

watch therefore, for ye know not at what hour your Lord shall come.

Matthew 25:13

watch therefore, for ye know neither the day nor the hour.

Luke 21:36

be therefore upon your guard, be constant in prayer, that you may be accounted worthy to escape all those future ills, and be able to stand in the presence of the son of God.

Matthew 24:44

therefore be ye also prepar'd: for the son of man may come at an hour you least expect.

1 Corinthians 16:13

Be upon the watch, stand firm in the faith, behave your selves like men of fortitude:

1 Thessalonians 5:6

therefore let us not sleep away our time like others, but be vigilant and temperate.

Matthew 24:36

As to the day and hour, that no one knows, not even the angels of heaven, but the father only.

Revelation 16:15

"I shall come with surprize, happy he that is upon the watch, and keepeth his garments pure, that his vices may not put him to shame."

Matthew 26:38-41

and he said to them, "my soul is exceeding sorrowful, even unto death:" stay here and watch by me.

Mark 13:33-37

be circumspect, be vigilant, and devout: because you are uncertain when that time will be.

Luke 12:35-40

Let your loins be girt, and your lamps burning:

Romans 13:11

Consider likewise the present season, that now it is high time to rouse out of sleep: for now is our salvation nearer than when we first believed.

1 Peter 4:7

The consummation of all things draws nigh. be temperate, be vigilant in prayer.

1 Peter 5:8

Be temperate, be vigilant: for your adversary the Devil goes about like a roaring lion, seeking whom he may devour.

Revelation 3:2-3

be watchful, and fortify the rest that are ready to die: for I have not found thy works perfect before God.

Treasury of Scripture Knowledge

Summary

Watch therefore: for ye know not what hour your Lord doth come.

Bible References

For

Matthew 24:36
As to the day and hour, that no one knows, not even the angels of heaven, but the father only.
Mark 13:33
be circumspect, be vigilant, and devout: because you are uncertain when that time will be.

General references

Matthew 24:36
As to the day and hour, that no one knows, not even the angels of heaven, but the father only.
Matthew 25:13
watch therefore, for ye know neither the day nor the hour.
Mark 13:33
be circumspect, be vigilant, and devout: because you are uncertain when that time will be.
Luke 12:40
be ye therefore likewise prepar'd; for the son of man will come, when you least expect him.