Revelation 16:14

For they are spirits of demons, which perform [supernatural] signs. These spirits go out to the kings of the whole world to assemble them for battle on the great day of Almighty God.

1 Timothy 4:1

Now the Holy Spirit specifically says that in later times [Note: "Later times" in the New Testament usually refers to the period following the first coming of Christ and the establishment of the church], some people will fall away from the faith [i.e., the true teaching of Christianity]. They will pay attention to deceitful spirits [i.e., lying people] and the teaching of evil spirits.

Revelation 17:14

These kings and the beast will wage war against the Lamb, and the Lamb will conquer them, for He is the Lord of lords and the King of kings. And those who are called and chosen [by God], and who are faithful [to Him will share the victory] with the Lamb."

Revelation 12:9

Then the great dragon was thrown out [of heaven]; he is the snake from ancient times who is [also] called "the Devil," and "Satan," the deceiver of the entire world. He was thrown down to earth along with his angels.

Revelation 20:8

and he will [again] go out to deceive the nations which are [located] throughout the whole world --- Gog and Magog. [Note: Based on Eze. 35-40, it appears that these names are used here figuratively for all the forces of wickedness which are enemies of God]. Satan will assemble them together for battle, and they will be as numberless as the sand on the seashore.

Revelation 3:10

Because you have obeyed my command to remain steadfast [in the face of difficult times], I will also keep you from [giving up when] the time of trial comes, which is about to come upon the whole world, to test those living on the earth.

Revelation 16:16

So, the [demonic] spirits assembled the kings together at the place which is called "Armageddon" in Hebrew. [Note: "Armageddon" means "mountain of Megiddo" and was a site in northwestern Palestine where several decisive battles had been fought centuries earlier. See Judges 4,5,7].

Matthew 24:24

For false Christs and false prophets will appear and they will perform great [miraculous] signs and [supernatural] wonders in order to lead astray even the elect [i.e., God's people], if possible.

Mark 13:22

For false Christs and false prophets will appear and they will perform [miraculous] signs and [supernatural] wonders in order to lead astray [even] the elect, if possible.

Luke 2:1

Now it happened in those days that a decree was sent out from Caesar Augustus [the Emperor of the Roman Empire] requiring [people from] the whole empire to be registered [i.e., for taxation purposes].

John 8:44

You belong to your father the devil, and you are [always] wanting to do what your father desires. He was a murderer from the [very] beginning [Note: This is probably a reference to Satan's influence on Adam, Eve and Cain in the Garden of Eden] and does not stand for the truth, because there is no truth in him. When he lies, he only speaks what is part of his nature, because he is a liar and the father of [all] liars.

Acts 13:8-10

But [another] magician, named Elymas (which means "the magician") opposed them, trying to discourage the magistrate from hearing about the faith.

Romans 1:8

First of all, I want to thank my God through Jesus Christ for all of you, because your faith is being told about throughout the whole world.

2 Corinthians 11:13-15

For such men are false apostles; they are deceitful workers, who disguise themselves as [true] apostles of Christ.

2 Thessalonians 2:9

The coming [of this lawless person] is according to the work of Satan, [and will be] attended by all kinds of powerful [i.e., miraculous] signs and false wonders,

James 3:15

This "wisdom" is not the kind that comes from [God] above, but is earthly, unspiritual and demonic [i.e., it is motivated by an evil spirit and not the Holy Spirit].

1 John 5:19

We [also] know that we are [children] of God and that the people of the whole world lie under [the control of] the evil one [i.e., Satan].

Revelation 6:17

For the terrible day of their anger has come, and who will be able to survive it?"

Revelation 13:3

And one of the beast's heads looked like it had been fatally wounded, but the wound healed and the entire world was amazed and followed after him.

Revelation 13:13-14

And he [i.e., this second beast] performs great [miraculous] signs, including making fire come down from heaven to earth in [full] view of people.

Revelation 16:7

And I heard [a voice from] the Altar saying, "Yes, O Lord, God Almighty, your judgments are true and just."

Revelation 19:19-20

Then I saw the beast [See 13:1ff], and the kings of the earth and their armies assembled together to wage war against the One who was riding on the horse [i.e., Christ. See verse 11] and His army.

Treasury of Scripture Knowledge

Summary

For they are the spirits of devils, working miracles, which go forth unto the kings of the earth and of the whole world, to gather them to the battle of that great day of God Almighty.

Which

God almighty

Bible References

The spirits

Revelation 12:9
Then the great dragon was thrown out [of heaven]; he is the snake from ancient times who is [also] called "the Devil," and "Satan," the deceiver of the entire world. He was thrown down to earth along with his angels.
John 8:44
You belong to your father the devil, and you are [always] wanting to do what your father desires. He was a murderer from the [very] beginning [Note: This is probably a reference to Satan's influence on Adam, Eve and Cain in the Garden of Eden] and does not stand for the truth, because there is no truth in him. When he lies, he only speaks what is part of his nature, because he is a liar and the father of [all] liars.
2 Corinthians 11:13
For such men are false apostles; they are deceitful workers, who disguise themselves as [true] apostles of Christ.
1 Timothy 4:1
Now the Holy Spirit specifically says that in later times [Note: "Later times" in the New Testament usually refers to the period following the first coming of Christ and the establishment of the church], some people will fall away from the faith [i.e., the true teaching of Christianity]. They will pay attention to deceitful spirits [i.e., lying people] and the teaching of evil spirits.
James 3:15
This "wisdom" is not the kind that comes from [God] above, but is earthly, unspiritual and demonic [i.e., it is motivated by an evil spirit and not the Holy Spirit].

Working

Revelation 13:13
And he [i.e., this second beast] performs great [miraculous] signs, including making fire come down from heaven to earth in [full] view of people.
Revelation 19:20
But the beast was captured, along with the false prophet [See 16:13], who performed [supernatural] signs in his presence. [He had performed these signs] to deceive those who had received the mark of the beast and those who worshiped his statue. [See 13:15-16]. The beast and the false prophet were both thrown alive into the lake of fire that burns with sulphur.
Matthew 24:24
For false Christs and false prophets will appear and they will perform great [miraculous] signs and [supernatural] wonders in order to lead astray even the elect [i.e., God's people], if possible.
Mark 13:22
For false Christs and false prophets will appear and they will perform [miraculous] signs and [supernatural] wonders in order to lead astray [even] the elect, if possible.
2 Thessalonians 2:9
The coming [of this lawless person] is according to the work of Satan, [and will be] attended by all kinds of powerful [i.e., miraculous] signs and false wonders,

Which

Acts 13:8
But [another] magician, named Elymas (which means "the magician") opposed them, trying to discourage the magistrate from hearing about the faith.

The whole

Revelation 3:10
Because you have obeyed my command to remain steadfast [in the face of difficult times], I will also keep you from [giving up when] the time of trial comes, which is about to come upon the whole world, to test those living on the earth.
Revelation 12:9
Then the great dragon was thrown out [of heaven]; he is the snake from ancient times who is [also] called "the Devil," and "Satan," the deceiver of the entire world. He was thrown down to earth along with his angels.
Revelation 13:3
And one of the beast's heads looked like it had been fatally wounded, but the wound healed and the entire world was amazed and followed after him.
Luke 2:1
Now it happened in those days that a decree was sent out from Caesar Augustus [the Emperor of the Roman Empire] requiring [people from] the whole empire to be registered [i.e., for taxation purposes].
Romans 1:8
First of all, I want to thank my God through Jesus Christ for all of you, because your faith is being told about throughout the whole world.
1 John 5:19
We [also] know that we are [children] of God and that the people of the whole world lie under [the control of] the evil one [i.e., Satan].

God almighty

Revelation 16:7
And I heard [a voice from] the Altar saying, "Yes, O Lord, God Almighty, your judgments are true and just."