Revelation 6:8-10 Common English Bible (CEB)
8 So I looked, and there was a pale green horse. Its rider’s name was Death, and the Grave was following right behind. They were given authority over a fourth of the earth, to kill by sword, famine, disease, and the wild animals of the earth.
9 When he opened the fifth seal, I saw under the altar those who had been slaughtered on account of the word of God and the witness they had given. 10 They cried out with a loud voice, “Holy and true Master, how long will you wait before you pass judgment? How long before you require justice for our blood, which was shed by those who live on earth?”