Revelation 6:9-11 - The Fifth Seal
9 And when the fifth stamp was undone, I saw under the altar the souls of those who had been put to death for the word of God, and for the witness which they kept. 10 And they gave a great cry, saying, How long will it be, O Ruler, holy and true, before you take your place as judge and give punishment for our blood to those on the earth? 11 And there was given to every one a white robe, and they were ordered to take their rest for a little time, till the number was complete of the other servants, their brothers, who would be put to death, even as they had been.