Revelation 8:7 The first sounded, and there came hail and fire, mixed with blood, and they were thrown to the earth; and a third of the earth was burned up, and a third of the trees were burned up, and all the green grass was burned up.

Revelation 9:15 And the four angels, who had been prepared for the hour and day and month and year, were released, so that they would kill a third of mankind.

Revelation 9:17 And this is how I saw in the vision the horses and those who sat on them: the riders had breastplates the color of fire and of hyacinth and of brimstone; and the heads of the horses are like the heads of lions; and out of their mouths proceed fire and smoke and brimstone. (NASB ©1995)