Resurrection, the first
'The first resurrection,' mentioned in Revelation 20:5, 6, does not mean a first resurrection, but the essence and primary part of resurrection, which is salvation and eternal life. There is only one resurrection to life. A second does not happen, and is not mentioned anywhere in the Bible.
(References: Apocalypse Explained 6; Apocalypse Revealed 851; Revelation 20:5-6)
Revelation 6:1-7
1
I saw that the Lamb opened one of the seven seals, and I heard one of the four living creatures saying, as with a voice of thunder, "Come and see!"
2
And behold, a white horse, and he who sat on it had a bow. A crown was given to him, and he came forth conquering, and to conquer.
3
When he opened the second seal, I heard the second living creature saying, "Come!"
4
Another came forth, a red horse. To him who sat on it was given power to take peace from the earth, and that they should kill one another. There was given to him a great sword.
5
When he opened the third seal, I heard the third living creature saying, "Come and see!" And behold, a black horse, and he who sat on it had a balance in his hand.
6
I heard a voice in the midst of the four living creatures saying, "A choenix of wheat for a denarius, and three choenix of barley for a denarius! Don't damage the oil and the wine!"
7
When he opened the fourth seal, I heard the fourth living creature saying, "Come and see!"