First let us see who are in the first resurrection, and reign with Christ a thousand years.
Rev 20:4 And I saw thrones, And they sat upon them, And judgment was given unto them: And I saw the souls of them that were beheaded for the witness of Jesus, And for the word of God, And which had not worshipped the beast, neither his image, neither had received his mark upon their foreheads, or in their hands; And they lived And reigned with Christ a thousand years.
Although this scripture does not say where they dwell with Christ but as we look at the following scriptures we will see where they shall dwell with Christ.
So we know who are in the group, so let us have a look at the next scripture.
Rev 15:2 And I saw as it were a sea of glass mingled with fire: And them that had gotten the victory over the beast, And over his image, And over his mark, And over the number of his name, stand on the sea of glass, having the harps of God.
Where is the sea of glass located?
Is this the same group as the first?
If it is the same group then how did they get there according to the following scripture.
14 And deceiveth them that dwell on the earth by the means of those miracles which he had power to do in the sight of the beast; saying to them that dwell on the earth, that they should make an image to the beast, which had the wound by a sword, and did live.
15 And he had power to give life unto the image of the beast, that the image of the beast should both speak, and cause that as many as would not worship the image of the beast should be killed.
Now have a look at these scriptures:
9 And when he had opened the fifth seal, I saw under the altar the souls of them that were slain for the word of God, and for the testimony which they held:
10 And they cried with a loud voice, saying, How long, O Lord, holy and true, dost thou not judge and avenge our blood on them that dwell on the earth?
11 And white robes were given unto every one of them; and it was said unto them, that they should rest yet for a little season, until their fellowservants also and their brethren, that should be killed as they were, should be fulfilled.
Where is the alter?
Where shall they be resting?
9 After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands;
10 And cried with a loud voice, saying, Salvation to our God which sitteth upon the throne, and unto the Lamb.
11 And all the angels stood round about the throne, and about the elders and the four beasts, and fell before the throne on their faces, and worshipped God,
12 Saying, Amen: Blessing, and glory, and wisdom, and thanksgiving, and honour, and power, and might, be unto our God for ever and ever. Amen.
13 And one of the elders answered, saying unto me, What are these which are arrayed in white robes? and whence came they?
14 And I said unto him, Sir, thou knowest. And he said to me, These are they which came out of great tribulation, and have washed their robes, and made them white in the blood of the Lamb.
15 Therefore are they before the throne of God, and serve him day and night in his temple: and he that sitteth on the throne shall dwell among them.
16 They shall hunger no more, neither thirst any more; neither shall the sun light on them, nor any heat.
17 For the Lamb which is in the midst of the throne shall feed them, and shall lead them unto living fountains of waters: and God shall wipe away all tears from their eyes.
Is this group seen to be in heaven or on earth?
Again where is the golden alter?
2 And I saw the seven angels which stood before God; and to them were given seven trumpets.
3 And another angel came and stood at the altar, having a golden censer; and there was given unto him much incense, that he should offer it with the prayers of all saints upon the golden altar which was before the throne.
4 And the smoke of the incense, which came with the prayers of the saints, ascended up before God out of the angel's hand.
If all groups mentioned are the same, then the millenium reign must be in heaven, according to the scriptures.