Luke 12:40

and ye, then, become ye ready, because at the hour ye think not, the Son of Man doth come.'

Matthew 24:42

'Watch ye therefore, because ye have not known in what hour your Lord doth come;

Matthew 24:44

because of this also ye, become ye ready, because in what hour ye do not think, the Son of Man doth come.

Matthew 25:13

'Watch therefore, for ye have not known the day nor the hour in which the Son of Man doth come.

Mark 13:33-36

Take heed, watch and pray, for ye have not known when the time is;

Luke 21:34-36

'And take heed to yourselves, lest your hearts may be weighed down with surfeiting, and drunkenness, and anxieties of life, and suddenly that day may come on you,

Romans 13:11

And this, knowing the time, that for us, the hour already is to be aroused out of sleep, for now nearer is our salvation than when we did believe;

Romans 13:14

but put ye on the Lord Jesus Christ, and for the flesh take no forethought -- for desires.

1 Thessalonians 5:6

so, then, we may not sleep as also the others, but watch and be sober,

2 Peter 3:12-14

waiting for and hasting to the presence of the day of God, by which the heavens, being on fire, shall be dissolved, and the elements with burning heat shall melt;

Revelation 19:7

may we rejoice and exult, and give the glory to Him, because come did the marriage of the Lamb, and his wife did make herself ready;

Treasury of Scripture Knowledge

Summary

Be ye therefore ready also: for the Son of man cometh at an hour when ye think not.

Bible References

General references

Luke 21:34
'And take heed to yourselves, lest your hearts may be weighed down with surfeiting, and drunkenness, and anxieties of life, and suddenly that day may come on you,
Matthew 24:42
'Watch ye therefore, because ye have not known in what hour your Lord doth come;
Matthew 25:13
'Watch therefore, for ye have not known the day nor the hour in which the Son of Man doth come.
Mark 13:33
Take heed, watch and pray, for ye have not known when the time is;
Romans 13:11
And this, knowing the time, that for us, the hour already is to be aroused out of sleep, for now nearer is our salvation than when we did believe;
1 Thessalonians 5:6
so, then, we may not sleep as also the others, but watch and be sober,
2 Peter 3:12
waiting for and hasting to the presence of the day of God, by which the heavens, being on fire, shall be dissolved, and the elements with burning heat shall melt;
Revelation 19:7
may we rejoice and exult, and give the glory to Him, because come did the marriage of the Lamb, and his wife did make herself ready;