Revelation 6:8-10

Living Bible

⁸ And now I saw a pale horse, and its rider’s name was Death. And there followed after him another horse whose rider’s name was Hell. They were given control of one-fourth of the earth, to kill with war and famine and disease and wild animals.

⁹ And when he broke open the fifth seal, I saw an altar, and underneath it all the souls of those who had been martyred for preaching the Word of God and for being faithful in their witnessing. ¹⁰ They called loudly to the Lord and said, “O Sovereign Lord, holy and true, how long will it be before you judge the people of the earth for what they’ve done to us? When will you avenge our blood against those living on the earth?”