And when he had opened the fourth seal, I heard the voice of the fourth
beast say, Come and see.
And I looked, and behold a pale horse: and his name that sat on him was
Death, and Hell followed with him. And power was given unto them over the
fourth part of the earth, to kill with sword, and with hunger, and with
death, and with the beasts of the earth. Revelation vi, 7-8