Matthew 24:48-51
But if that wicked servant say in his heart, My master will be a long while ere he comes;
Mark 13:32-37
But of that day and hour knoweth no man, nor the angels which are in heaven, nor the Son, but the Father.
Luke 21:34-36
But take heed to yourselves, lest at any time your hearts should be overloaded with surfeiting and drunkenness, and the anxious cares of life, and that day should come upon you unawares.
1 Thessalonians 5:2-3
for yourselves know precisely that the day of the Lord so cometh as a thief in the night.
Revelation 3:3
Remember therefore how thou hast received and heard, and observe, and repent. If then thou art not found watching, I will come upon thee as a thief, and thou shalt in no wise know at what hour I will come upon thee.