Rev 6:9-11 = the Saints in Heaven who have died and living Saints on earth during the tribulation
And when the Lamb opened the fifth seal, I saw under the altar the souls of those who had been slain for the word of God and for the testimony they had upheld. And they cried out in a loud voice, “How long, O Lord, holy and true, until You avenge our blood and judge those who dwell upon the earth?”
Then each of them was given a white robe and told to rest a little while longer, until the full number of their fellow servants, their brothers, were killed, just as they had been killed
Revelation ch7 - Then one of the elders addressed me: “These in white robes,” he asked, “who are they, and where have they come from?”
14“Sir,” I answered, “you know.”
So he replied, “These are the ones who have come out of the great tribulation; they have washed their robes and made them white in the blood of the Lamb.
Revelation ch13 - The Church/Saints on earth during the great tribulation
And all who dwell on the earth will worship the beast—all whose names
have not been written from the foundation of the world in the Book of Life belonging to the Lamb who was slain.
He who has an ear, let him hear:
“If anyone is destined for captivity,
into captivity he will go;
if anyone is to die by the sword,
by the sword he must be killed.”
Here is a call for the perseverance and faith of the saints.
Revelation ch14 - The Church/Saints on earth during the great tribulation.
Here is a call for the perseverance of the saints who keep the commandments of God and the faith of Jesus.
And I heard a voice from heaven telling me to write, “Blessed are the dead—those who die in the Lord from this moment on.”