Actually, even Revelation 20, although it says there are two resurrections, it doesn't give us any information about the second resurrection. Revelation 20 says "the rest of the dead", regarding the second resurrection, but that does not require that the righteous can't be resurrected along with the rest of the dead.
The first resurrection is for the righteous, and the righteous only. I think we can agree on that.
But the Bible talks about a resurrection that includes both the righteous and the wicked. By process of elimination we know that this must be the second resurrection.
Daniel 12:2
And many of them that sleep in the dust of the earth shall awake, some to everlasting life, and some to shame and everlasting contempt.
John 5:28-29
Marvel not at this: for the hour is coming, in the which all that are in the graves shall hear his voice,
29 And shall come forth; they that have done good, unto the resurrection of life; and they that have done evil, unto the resurrection of damnation.
Acts 24:15
having a hope in God, which these men cherish themselves, that there shall certainly be a resurrection of both the righteous and the wicked.
1 Corinthians 15:22
For as in Adam all die, even so in Christ shall all be made alive.