Revelation 6:6-8

6And I heard as it were a voice in the midst of the four living creatures saying, A measure of wheat for a penny and three measures of barley for a penny; and the oil and the wine hurt thou not.

7And when he opened the fourth seal, I heard the voice of the fourth living creature saying, Come.

8And I saw, and behold, a pale horse: and he that sat upon him, his name was Death; and Hades followed with him. And there was given unto them authority over the fourth part of the earth, to kill with sword, and with famine, and with death, and by the wild beasts of the earth.