Mark 13:33
Be on guard, keep awake. For you do not know when the time will come.
Ephesians 6:18
praying at all times in the Spirit, with all prayer and supplication. To that end keep alert with all perseverance, making supplication for all the saints,
Matthew 24:42-44
Therefore, stay awake, for you do not know on what day your Lord is coming.
Matthew 25:13
Watch therefore, for you know neither the day nor the hour.
Matthew 26:40-41
And he came to the disciples and found them sleeping. And he said to Peter, "So, could you not watch with me one hour?
Mark 13:23
But be on guard; I have told you all things beforehand.
Mark 13:35-37
Therefore stay awake--for you do not know when the master of the house will come, in the evening, or at midnight, or when the rooster crows, or in the morning--
Mark 14:37-38
And he came and found them sleeping, and he said to Peter, "Simon, are you asleep? Could you not watch one hour?
Luke 12:40
You also must be ready, for the Son of Man is coming at an hour you do not expect."
Luke 21:34-36
"But watch yourselves lest your hearts be weighed down with dissipation and drunkenness and cares of this life, and that day come upon you suddenly like a trap.
Romans 13:11-12
Besides this you know the time, that the hour has come for you to wake from sleep. For salvation is nearer to us now than when we first believed.
Romans 13:14
But put on the Lord Jesus Christ, and make no provision for the flesh, to gratify its desires.
1 Corinthians 16:13
Be watchful, stand firm in the faith, act like men, be strong.
1 Thessalonians 5:5-8
For you are all children of light, children of the day. We are not of the night or of the darkness.
Hebrews 12:15
See to it that no one fails to obtain the grace of God; that no "root of bitterness" springs up and causes trouble, and by it many become defiled;
1 Peter 4:7
The end of all things is at hand; therefore be self-controlled and sober-minded for the sake of your prayers.
1 Peter 5:8
Be sober-minded; be watchful. Your adversary the devil prowls around like a roaring lion, seeking someone to devour.
Revelation 3:2
Wake up, and strengthen what remains and is about to die, for I have not found your works complete in the sight of my God.
Revelation 16:15
("Behold, I am coming like a thief! Blessed is the one who stays awake, keeping his garments on, that he may not go about naked and be seen exposed!")