1 Thessalonians 5:2-6
For you are fully aware that the Day of the Lord will come like a thief in the night. / While people are saying, “Peace and security,” destruction will come upon them suddenly, like labor pains on a pregnant woman, and they will not escape. / But you, brothers, are not in the darkness so that this day should overtake you like a thief. ...

Mark 13:33-37
Be on your guard and stay alert! For you do not know when the appointed time will come. / It is like a man going on a journey who left his house, put each servant in charge of his own task, and instructed the doorkeeper to keep watch. / Therefore keep watch, because you do not know when the master of the house will return—whether in the evening, at midnight, when the rooster crows, or in the morning. ...

Luke 21:34-36
But watch yourselves, or your hearts will be weighed down by dissipation, drunkenness, and the worries of life—and that day will spring upon you suddenly like a snare. / For it will come upon all who dwell on the face of all the earth. / So keep watch at all times, and pray that you may have the strength to escape all that is about to happen and to stand before the Son of Man.”

Revelation 3:3
Remember, then, what you have received and heard. Keep it and repent. If you do not wake up, I will come like a thief, and you will not know the hour when I will come upon you.

1 Peter 4:7
The end of all things is near. Therefore be clear-minded and sober, so that you can pray.

Romans 13:11-12
And do this, understanding the occasion. The hour has come for you to wake up from your slumber, for our salvation is nearer now than when we first believed. / The night is nearly over; the day has drawn near. So let us lay aside the deeds of darkness and put on the armor of light.

Luke 12:35-40
Be dressed for service and keep your lamps burning. / Then you will be like servants waiting for their master to return from the wedding banquet, so that when he comes and knocks, they can open the door for him at once. / Blessed are those servants whom the master finds on watch when he returns. Truly I tell you, he will dress himself to serve and will have them recline at the table, and he himself will come and wait on them. ...

2 Peter 3:10-12
But the Day of the Lord will come like a thief. The heavens will disappear with a roar, the elements will be destroyed by fire, and the earth and its works will be laid bare. / Since everything will be destroyed in this way, what kind of people ought you to be? You ought to conduct yourselves in holiness and godliness / as you anticipate and hasten the coming of the day of God, when the heavens will be destroyed by fire and the elements will melt in the heat.

Matthew 25:13
Therefore keep watch, because you do not know the day or the hour.

Revelation 16:15
“Behold, I am coming like a thief. Blessed is the one who remains awake and clothed, so that he will not go naked and let his shame be exposed.”

Hebrews 10:25
Let us not neglect meeting together, as some have made a habit, but let us encourage one another, and all the more as you see the Day approaching.

Proverbs 8:34
Blessed is the man who listens to me, watching daily at my doors, waiting at the posts of my doorway.

Ezekiel 3:17
“Son of man, I have made you a watchman for the house of Israel. Whenever you hear a word from My mouth, give them a warning from Me.

Isaiah 21:11-12
This is the burden against Dumah: One calls to me from Seir, “Watchman, what is left of the night? Watchman, what is left of the night?” / The watchman replies, “Morning has come, but also the night. If you would inquire, then inquire. Come back yet again.”

Habakkuk 2:1
I will stand at my guard post and station myself on the ramparts. I will watch to see what He will say to me, and how I should answer when corrected.