Matthew 24:42

Therefore watch; for you cannot be sure on what day your Master is coming.

Matthew 25:13

Therefore watch, since you know neither the Day nor the Hour.

Luke 21:36

Be on the watch at all times, and pray that you may have strength to escape all that is destined to happen, and to stand in the presence of the Son of Man."

Matthew 24:44

Therefore, do you also prepare, since it is just when you are least expecting him that the Son of Man will come.

1 Corinthians 16:13

Be watchful; stand firm in your faith; show yourselves men; be strong.

1 Thessalonians 5:6

Therefore let us not sleep as others do. No, let us be watchful and self-controlled.

Matthew 24:36

But about that Day and Hour, no one knows--not even the angels of Heaven, nor yet the Son--but only the Father himself.

Revelation 16:15

('I am coming like a thief! Happy will he be who is on the watch, and keeps his clothing at hand, so that he will not have to walk about unclothed and let men see his nakedness.')

Matthew 26:38-41

"I am sad at heart," he said, "sad even to death; wait here and watch with me."

Mark 13:33-37

See that you are on the watch; for you do not know when the time will be.

Luke 12:35-40

Make yourselves ready, with your lamps alight;

Romans 13:11

This I say, because you know the crisis that we have reached, for the time has already come for you to rouse yourselves from sleep; our Salvation is nearer now than when we accepted the Faith.

1 Peter 4:7

But the end of all things is near. Therefore exercise self-restraint and be calm, that you may be able to pray.

1 Peter 5:8

Exercise self-control, be watchful. Your adversary, the Devil, like a roaring lion, is prowling about, eager to devour you.

Revelation 3:2-3

Be on the watch, and strengthen what still survives, though once it was all but dead; for I have not found your life perfect in the eyes of my God.

Treasury of Scripture Knowledge

Summary

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

Bible References

For

Matthew 24:36
But about that Day and Hour, no one knows--not even the angels of Heaven, nor yet the Son--but only the Father himself.
Mark 13:33
See that you are on the watch; for you do not know when the time will be.

General references

Matthew 24:36
But about that Day and Hour, no one knows--not even the angels of Heaven, nor yet the Son--but only the Father himself.
Matthew 25:13
Therefore watch, since you know neither the Day nor the Hour.
Mark 13:33
See that you are on the watch; for you do not know when the time will be.
Luke 12:40
Do you also prepare, for when you are least expecting him the Son of Man will come."