A third of the people were killed by the three plagues of fire, smoke and sulfur that came out of their mouths.
NIV
A third of mankind was killed by these three plagues--by the fire and the smoke and the sulphur (brimstone) that poured from the mouths of the horses.
AMP
By these three was the third part of men killed, by the fire, and by the smoke, and by the brimstone, which issued out of their mouths.
KJV
They were told not to harm the grass of the earth or any plant or tree, but only those people who did not have the seal of God on their foreheads.
NIV
They were told not to injure the herbage of the earth nor any green thing nor any tree, but only [to attack] such human beings as do not have the seal (mark) of God on their foreheads. [Ezek. 9:4.]AMP
And it was commanded them that they should not hurt the grass of the earth, neither any green thing, neither any tree; but only those men which have not the seal of God in their foreheads.
KJV
When he opened the Abyss, smoke rose from it like the smoke from a gigantic furnace. The sun and sky were darkened by the smoke from the Abyss.
NIV
He opened the long shaft of the Abyss (the bottomless pit), and smoke like the smoke of a huge furnace puffed out of the long shaft, so that the sun and the atmosphere were darkened by the smoke from the long shaft. [Gen. 19:28; Exod. 19:18; Joel 2:10.]AMP
And he opened the bottomless pit; and there arose a smoke out of the pit, as the smoke of a great furnace; and the sun and the air were darkened by reason of the smoke of the pit.
KJV
The locusts looked like horses prepared for battle. On their heads they wore something like crowns of gold, and their faces resembled human faces.
NIV
The locusts resembled horses equipped for battle. On their heads was something like golden crowns. Their faces resembled the faces of people. [Joel 2:4.]AMP
And the shapes of the locusts were like unto horses prepared unto battle; and on their heads were as it were crowns like gold, and their faces were as the faces of men.
KJV
They had as king over them the angel of the Abyss, whose name in Hebrew is Abaddon and in Greek is Apollyon (that is, Destroyer).
NIV
Over them as king they have the angel of the Abyss (of the bottomless pit). In Hebrew his name is Abaddon [destruction], but in Greek he is called Apollyon [destroyer].
AMP
And they had a king over them, which is the angel of the bottomless pit, whose name in the Hebrew tongue is Abaddon, but in the Greek tongue hath his name Apollyon.
KJV
They were not allowed to kill them but only to torture them for five months. And the agony they suffered was like that of the sting of a scorpion when it strikes.
NIV
They were not permitted to kill them, but to torment (distress, vex) them for five months; and the pain caused them was like the torture of a scorpion when it stings a person.
AMP
And to them it was given that they should not kill them, but that they should be tormented five months: and their torment was as the torment of a scorpion, when he striketh a man.
KJV
They had breastplates like breastplates of iron, and the sound of their wings was like the thundering of many horses and chariots rushing into battle.
NIV
Their breastplates (scales) resembled breastplates made of iron, and the [whirring] noise made by their wings was like the roar of a vast number of horse-drawn chariots going at full speed into battle. [Joel 2:5.]AMP
And they had breastplates, as it were breastplates of iron; and the sound of their wings was as the sound of chariots of many horses running to battle.
KJV
