Matthew 24:42

Therefore be on the alert, because you do not know what day your Lord is coming!

Matthew 25:13

Therefore be on the alert, because you do not know the day or the hour!

Luke 21:36

But be alert at all times, praying that you may have strength to escape all these [things] [that] are going to happen, and to stand before the Son of Man."

Matthew 24:44

For this [reason] you also must be ready, because the Son of Man is coming at an hour that you do not think [he will come].

1 Corinthians 16:13

Be on the alert, stand firm in the faith, act courageously, be strong.

1 Thessalonians 5:6

So then, we must not sleep like the rest, but must be on the alert and be self-controlled.

Matthew 24:36

"But concerning that day and hour no one knows--not even the angels of heaven nor the Son--except the Father alone.

Revelation 16:15

(Behold, I am coming like a thief. Blessed [is] the one who is on the alert and who keeps his clothing, so that he does not walk around naked and they see his shamefulness!)

Matthew 26:38-41

Then he said to them, "My soul is deeply grieved, to the point of death. Remain here and stay awake with me."

Mark 13:33-37

Watch out! Be alert, because you do not know when the time is!

Luke 12:35-40

"{You must be prepared for action} and [your] lamps burning.

Romans 13:11

And [do] this [because you] know the time, that [it is] already the hour for you to wake up from sleep. For our salvation [is] nearer now than when we believed.

1 Peter 4:7

Now the end of all [things] draws near. Therefore be self-controlled and sober-minded for [your] prayers.

1 Peter 5:8

Be sober; be on the alert. Your adversary the devil walks around like a roaring lion, looking for someone to devour.

Revelation 3:2-3

Be on the alert and strengthen the remaining [things] that are about to die, for I have not found your works completed before 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 concerning that day and hour no one knows--not even the angels of heaven nor the Son--except the Father alone.
Mark 13:33
Watch out! Be alert, because you do not know when the time is!

General references

Matthew 24:36
"But concerning that day and hour no one knows--not even the angels of heaven nor the Son--except the Father alone.
Matthew 25:13
Therefore be on the alert, because you do not know the day or the hour!
Mark 13:33
Watch out! Be alert, because you do not know when the time is!
Luke 12:40
You also must be ready, because the Son of Man is coming at an hour that you do not think [he will come]."