Revelation 3:3 — Remember therefore how you have received and heard; hold fast and repent. Therefore if you will not watch, I will come upon you as a thief, and you will not know what hour I will come upon you.
1 Thessalonians 5:2-6 — For you yourselves know perfectly that the day of the Lord so comes as a thief in the night. For when they say, “Peace and safety!” then sudden destruction comes upon them, as labor pains upon a pregnant woman. And they shall not escape. But you, brethren, are not in darkness, so that this Day should overtake you as a thief. You are all sons of light and sons of the day. We are not of the night nor of darkness. Therefore let us not sleep, as others do, but let us watch and be sober.
Revelation 16:15 — “Behold, I am coming as a thief. Blessed is he who watches, and keeps his garments, lest he walk naked and they see his shame.”
Luke 21:34-35 — “But take heed to yourselves, lest your hearts be weighed down with carousing, drunkenness, and cares of this life, and that Day come on you unexpectedly. For it will come as a snare on all those who dwell on the face of the whole earth.
Luke 12:35-40 — “Let your waist be girded and your lamps burning; and you yourselves be like men who wait for their master, when he will return from the wedding, that when he comes and knocks they may open to him immediately. Blessed are those servants whom the master, when he comes, will find watching. Assuredly, I say to you that he will gird himself and have them sit down to eat, and will come and serve them. And if he should come in the second watch, or come in the third watch, and find them so, blessed are those servants. But know this, that if the master of the house had known what hour the thief would come, he would have watched and not allowed his house to be broken into. Therefore you also be ready, for the Son of Man is coming at an hour you do not expect.”
Matthew 25:13 — “Watch therefore, for you know neither the day nor the hour in which the Son of Man is coming.
Mark 13:32-35 — “But of that day and hour no one knows, not even the angels in heaven, nor the Son, but only the Father. Take heed, watch and pray; for you do not know when the time is. It is like a man going to a far country, who left his house and gave authority to his servants, and to each his work, and commanded the doorkeeper to watch. Watch therefore, for you do not know when the master of the house is coming—in the evening, at midnight, at the crowing of the rooster, or in the morning—
2 Peter 3:10 — But the day of the Lord will come as a thief in the night, in which the heavens will pass away with a great noise, and the elements will melt with fervent heat; both the earth and the works that are in it will be burned up.
See Also: End Times: Putting the Pieces in Place
Unless noted otherwise, all Scripture verses are from The New King James Version. 1996, ©1982. Nashville: Thomas Nelson.