Revelation 3:2

Be on the watch, and strengthen what still survives, though once it was all but dead; for I have not found your life perfect in the eyes of my God.

Matthew 6:2-4

Therefore, when you do acts of charity, do not have a trumpet blown in front of you, as hypocrites do in the Synagogues and in the streets, that they may be praised by others. There, I tell you, is their reward!

Matthew 23:5

All their actions are done to attract attention. They widen their phylacteries, and increase the size of their tassels,

Matthew 23:28-38

It is the same with you. Outwardly, and to others, you have the look of religious men, but inwardly you are full of hypocrisy and sin.

Matthew 24:42-51

Therefore watch; for you cannot be sure on what day your Master is coming.

Matthew 25:13

Therefore watch, since you know neither the Day nor the Hour.

Mark 13:33-37

See that you are on the watch; for you do not know when the time will be.

Luke 22:31-32

Simon! Simon! listen. Satan demanded leave to sift you all like wheat,

Acts 18:23

After making some stay in Antioch, he set out on a tour through the Phrygian district of Galatia, strengthening the faith of all the disciples as he went.

Acts 20:28-31

Be watchful over yourselves, and over the whole flock, of which the Holy Spirit has placed you in charge, to shepherd the Church of God, which he won for himself at the cost of his life.

2 Timothy 4:1-4

I solemnly charge you, in the sight of God and of Christ Jesus, who will one day judge the living and the dead--I charge you by his Appearing and by his Kingdom:--

1 Peter 4:7

But the end of all things is near. Therefore exercise self-restraint and be calm, that you may be able to pray.

1 Peter 5:8

Exercise self-control, be watchful. Your adversary, the Devil, like a roaring lion, is prowling about, eager to devour you.

Revelation 2:4

But this I have against you--You have abandoned your first love.

Revelation 16:15

('I am coming like a thief! Happy will he be who is on the watch, and keeps his clothing at hand, so that he will not have to walk about unclothed and let men see his nakedness.')

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
('I am coming like a thief! Happy will he be who is on the watch, and keeps his clothing at hand, so that he will not have to walk about unclothed and let men see his nakedness.')
Matthew 24:42
Therefore watch; for you cannot be sure on what day your Master is coming.
Matthew 25:13
Therefore watch, since you know neither the Day nor the Hour.
Mark 13:33
See that you are on the watch; for you do not know when the time will be.
Acts 20:28
Be watchful over yourselves, and over the whole flock, of which the Holy Spirit has placed you in charge, to shepherd the Church of God, which he won for himself at the cost of his life.
2 Timothy 4:1
I solemnly charge you, in the sight of God and of Christ Jesus, who will one day judge the living and the dead--I charge you by his Appearing and by his Kingdom:--
1 Peter 4:7
But the end of all things is near. Therefore exercise self-restraint and be calm, that you may be able to pray.
1 Peter 5:8
Exercise self-control, be watchful. Your adversary, the Devil, like a roaring lion, is prowling about, eager to devour you.

Strengthen

Revelation 2:4
But this I have against you--You have abandoned your first love.
Luke 22:31
Simon! Simon! listen. Satan demanded leave to sift you all like wheat,
Acts 18:23
After making some stay in Antioch, he set out on a tour through the Phrygian district of Galatia, strengthening the faith of all the disciples as he went.

Thy works

Matthew 6:2
Therefore, when you do acts of charity, do not have a trumpet blown in front of you, as hypocrites do in the Synagogues and in the streets, that they may be praised by others. There, I tell you, is their reward!
Matthew 23:5
All their actions are done to attract attention. They widen their phylacteries, and increase the size of their tassels,

General references

Matthew 25:7
Then all the bridesmaids awoke and trimmed their lamps.
Mark 13:33
See that you are on the watch; for you do not know when the time will be.
1 Corinthians 11:31
But, if we judged ourselves rightly, we should not be judged.