Matthew 24:42, 44
Therefore keep watch, because you do not know the day on which your Lord will come. . . .

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

Zechariah 14:7
It will be a day known only to the LORD, without day or night; but when evening comes, there will be light.

Mark 13:32
But as for that day or hour, no one knows, not even the angels in heaven, nor the Son, but only the Father.

Acts 1:7
Jesus replied, "It is not for you to know times or seasons that the Father has fixed by His own authority.

1 Thessalonians 5:2
For you are fully aware that the day of the Lord will come like a thief in the night.

2 Peter 3:10
But the day of the Lord will come like a thief. The heavens will disappear with a roar, the elements will be dissolved in the fire, and the earth and its works will not be found.

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.

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."