Revelation 6:9-11 - The Fifth Seal
9 And when he opened the fifth seal, I saw under the altar the souls of them that had been slain for the word of God, and for the testimony which they held. 10 And they cried with a loud voice, saying, How long, O Lord, thou Holy One and true, dost thou not judge and avenge our blood on them that dwell upon the earth? 11 And there was given to them, to every one, a white robe; and it was said to them, that they should rest yet for a time, till their fellow servants also and their brethren should be fulfilled, who should be killed even as they were.