Revelation 6:9
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.
What it says
John sees under the altar the souls of those slain for God's word and their testimony.
What it is doing
This verse reveals the heavenly location and honored memory of the martyrs.
In context
9And 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. 10And they cried out in a loud voice, “How long, O Lord, holy and true, until You judge those who dwell upon the earth and avenge our blood?” 11Then 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.