Revelation 6:8-10 Amplified Bible, Classic Edition (AMPC)
8 So I looked, and behold, an ashy pale horse [[a]black and blue as if made so by bruising], and its rider’s name was Death, and Hades (the realm of the dead) followed him closely. And they were given authority and power over a fourth part of the earth to kill with the sword and with famine and with plague (pestilence, disease) and with wild beasts of the earth.
9 When the Lamb broke open the fifth seal, I saw at the foot of the altar the souls of those whose lives had been sacrificed for [adhering to] the Word of God and for the testimony they had borne.
10 They cried in a loud voice, O [Sovereign] Lord, holy and true, how long now before You will sit in judgment and avenge our blood upon those who dwell on the earth?
Revelation 6:8-10 New International Version (NIV)
8 I looked, and there before me was a pale horse! Its rider was named Death, and Hades was following close behind him. They were given power over a fourth of the earth to kill by sword, famine and plague, and by the wild beasts of the earth.
9 When he opened the fifth seal, I saw under the altar the souls of those who had been slain because of the word of God and the testimony they had maintained. 10 They called out in a loud voice, “How long, Sovereign Lord, holy and true, until you judge the inhabitants of the earth and avenge our blood?”