Revelation 3:2

Be you watchful, and strengthen the remaining things, which are about to die. For I have not found your works perfect before my God.

Matthew 6:2-4

therefore when you may do alms, do not sound a trumpet before you, as the hypocrites do in the synagogues and in the streets, in order that they may be glorified by the people: truly I say unto you, They exhaust their reward.

Matthew 23:5

And they do all their works to be seen by the people: for they broaden their phylacteries, and enlarge the borders of their garments,

Matthew 23:28-38

So you also appear unto the people indeed righteous, but within you are full of hypocrisy and iniquity.

Matthew 24:42-51

Watch therefore: because you do not know on what day your Lord cometh.

Matthew 25:13

Watch therefore, because you know neither the day nor the hour.

Mark 13:33-37

Beware, watch; for you know not when the time is.

Luke 22:31-32

Simon, Simon, behold, Satan sought you out, to sift you as wheat:

Acts 18:23

having spent some time, he went from them, traveling consecutively through the Galatian country and Phrygia, confirming all the disciples.

Acts 20:28-31

Take heed to yourselves, and all the flock, over which the Holy Ghost has placed you shepherds, to shepherdise the church of God, which He bought with His own blood.

2 Timothy 4:1-4

In the presence of God, and Jesus Christ, the one about to judge the living and the dead, I testify to, both his appearing and his kingdom;

1 Peter 4:7

But the end of all things is at hand. Therefore be prudent, and sober unto prayers:

1 Peter 5:8

Be sober, watch. The devil is walking round like a roaring lion, seeking some one to devour:

Revelation 2:4

But I have something against you, because you have left your first love.

Revelation 16:15

Behold, I am coming as a thief; blessed is the one watching and keeping his garments, in order that he may not walk about naked, and they may see his shame.

Treasury of Scripture Knowledge

Summary

Be watchful, and strengthen the things which remain, that are ready to die: for I have not found thy works perfect before God.

Bible References

Watchful

Revelation 16:15
Behold, I am coming as a thief; blessed is the one watching and keeping his garments, in order that he may not walk about naked, and they may see his shame.
Matthew 24:42
Watch therefore: because you do not know on what day your Lord cometh.
Matthew 25:13
Watch therefore, because you know neither the day nor the hour.
Mark 13:33
Beware, watch; for you know not when the time is.
Acts 20:28
Take heed to yourselves, and all the flock, over which the Holy Ghost has placed you shepherds, to shepherdise the church of God, which He bought with His own blood.
2 Timothy 4:1
In the presence of God, and Jesus Christ, the one about to judge the living and the dead, I testify to, both his appearing and his kingdom;
1 Peter 4:7
But the end of all things is at hand. Therefore be prudent, and sober unto prayers:
1 Peter 5:8
Be sober, watch. The devil is walking round like a roaring lion, seeking some one to devour:

Strengthen

Revelation 2:4
But I have something against you, because you have left your first love.
Luke 22:31
Simon, Simon, behold, Satan sought you out, to sift you as wheat:
Acts 18:23
having spent some time, he went from them, traveling consecutively through the Galatian country and Phrygia, confirming all the disciples.

Thy works

Matthew 6:2
therefore when you may do alms, do not sound a trumpet before you, as the hypocrites do in the synagogues and in the streets, in order that they may be glorified by the people: truly I say unto you, They exhaust their reward.
Matthew 23:5
And they do all their works to be seen by the people: for they broaden their phylacteries, and enlarge the borders of their garments,

General references

Matthew 25:7
Then all those virgins arose and trimmed their lamps.
Mark 13:33
Beware, watch; for you know not when the time is.
1 Corinthians 11:31
But if we judged ourselves, we would not be judged: