For this we say unto you by the word of the Lord, that we which are alive and remain unto the coming of the Lord shall not prevent them which are asleep. For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first:
Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord. Wherefore comfort one another with these words. -- 1 Thessalonians 4:15-18
If anyone worships the beast and its image, and receives a mark in his forehead or in his hand, he also will drink of the wine of the anger of God, having been mixed undiluted in the cup of His wrath.
And he will be tormented by fire and brimstone before the holy angels, and in the presence of the Lamb. And the smoke of their torment goes up forever and ever. And they have no rest day or night, those who worship the beast and its image, and whoever receives the mark of its name. -- Revelation 14:9-11
And all dwelling on the earth will worship it, those whose names have not been written in the Book of Life of the Lamb slain, from the foundation of the world. -- Revelation 13:8
And when they shall have finished their testimony, the beast that ascends out of the bottomless pit shall make war against them, and shall overcome them, and kill them.
And after three days and an half the spirit of life from God entered into them, and they stood upon their feet; and great fear fell upon them which saw them. And they heard a great voice from heaven saying unto them, Come up here. And they ascended up to heaven in a cloud; and their enemies beheld them. -- Revelation 11:7 & 11-12.
Note:
1. The two witnesses will not be martyred by the beast that ascends from out of the abyss before it ascends from out of the abyss.
2. The martyred two witnesses cannot rise again from the dead before the return of Christ, because at the time of the return of Christ, the dead in Christ will rise first.
And I saw thrones, and they sat on them, and judgment was given to them. And I saw the souls of those who had been beheaded for the witness of Jesus and for the Word of God, and who had not worshiped the beast nor his image, nor had received his mark on their foreheads, nor in their hands. And they were alive in their bodies [záō] and reigned with Christ a thousand years.
This is the first resurrection of the body [anástasis]. Blessed and holy is he who has part in the first resurrection. The second death has no authority over these, but they will be priests of God and of Christ, and will reign with Him a thousand years. -- Revelation 20:4-5
The Greek word anástasis always refers to the resurrection of the body in the New Testament, without exception.