Matthew 24:42

“So be alert [give strict attention, be cautious and active in faith], for you do not know which day [whether near or far] your Lord is coming.

Matthew 25:13

Therefore, be on the alert [be prepared and ready], for you do not know the day nor the hour [when the Son of Man will come].

Luke 21:36

But keep alert at all times [be attentive and ready], praying that you may have the strength and ability [to be found worthy and] to escape all these things that are going to take place, and to stand in the presence of the Son of Man [at His coming].”

Matthew 24:44

Therefore, you [who follow Me] must also be ready; because the Son of Man is coming at an hour when you do not expect Him.

1 Corinthians 16:13

Be on guard; stand firm in your faith [in God, respecting His precepts and keeping your doctrine sound]. Act like [mature] men and be courageous; be strong.

1 Thessalonians 5:6

So then let us not sleep [in spiritual indifference] as the rest [of the world does], but let us keep wide awake [alert and cautious] and let us be sober [self-controlled, calm, and wise].

Matthew 24:36

“But of that [exact] day and hour no one knows, not even the angels of heaven, nor the Son [in His humanity], but the Father alone.

Revelation 16:15

(“Behold, I am coming like a thief. Blessed is he who stays awake and who keeps his clothes [that is, stays spiritually ready for the Lord’s return], so that he will not be naked—spiritually unprepared—and men will not see his shame.”)

Matthew 26:38-41

Then He said to them, “My soul is deeply grieved, so that I am almost dying of sorrow. Stay here and stay awake and keep watch with Me.”

Mark 13:33-37

“Be on guard and stay constantly alert [and pray]; for you do not know when the appointed time will come.

Luke 12:35-40

“Be dressed and ready for active service, and keep your lamps continuously burning.

Romans 13:11

Do this, knowing that this is a critical time. It is already the hour for you to awaken from your sleep [of spiritual complacency]; for our salvation is nearer to us now than when we first believed [in Christ].

1 Peter 4:7

The end and culmination of all things is near. Therefore, be sound-minded and self-controlled for the purpose of prayer [staying balanced and focused on the things of God so that your communication will be clear, reasonable, specific and pleasing to Him.]

1 Peter 5:8

Be sober [well balanced and self-disciplined], be alert and cautious at all times. That enemy of yours, the devil, prowls around like a roaring lion [fiercely hungry], seeking someone to devour.

Revelation 3:2-3

Wake up, and strengthen and reaffirm what remains [of your faithful commitment to Me], which is about to die; for I have not found [any of] your deeds completed in the sight of My God or meeting His requirements.

Treasury of Scripture Knowledge

Summary

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

Bible References

For

Matthew 24:36
“But of that [exact] day and hour no one knows, not even the angels of heaven, nor the Son [in His humanity], but the Father alone.
Mark 13:33
“Be on guard and stay constantly alert [and pray]; for you do not know when the appointed time will come.

General references

Matthew 24:36
“But of that [exact] day and hour no one knows, not even the angels of heaven, nor the Son [in His humanity], but the Father alone.
Matthew 25:13
Therefore, be on the alert [be prepared and ready], for you do not know the day nor the hour [when the Son of Man will come].
Mark 13:33
“Be on guard and stay constantly alert [and pray]; for you do not know when the appointed time will come.
Luke 12:40
You too, be continually ready; because the Son of Man is coming at an hour that you do not expect.”