^ @Inquisitor , my point IS NOT to say this passage is saying these people didn't DIE [/be KILLED]; my point is to show that NOT "ALL" receive the mark, though that is the AIM / PURPOSE / OBJECTIVE of the [one in] verse 13:16;
Then I went on to support my other point that not all "saints" will be KILLED / MARTYRED / BEHEADED in the Trib... SOME will survive to the END of it and ENTER the MK age in their mortal bodies (I supplied a few passages covering this point in the chronology).
So here's what
Rev15 says (per your question)... and again, I'm not saying THESE SAINTS (in this context) haven't been KILLED... I'm saying the one "aiming / purposing" to have
"ALL" take the mark, isn't successful (in that endeavor) OVER THESE:
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.
Rev 15:3
And they sing the song of Moses the servant of God, and the song of the Lamb, saying, Great and marvellous
are thy works, Lord God Almighty; just and true
are thy ways, thou King of saints.
Rev 15:4
Who shall not fear thee, O Lord, and glorify thy name? for
thou only
art holy:
for all nations shall come and worship before thee; for thy judgments are made manifest. [corresponds with Dan7:27, etc]