Revelation of John 9:9 · Bible study
Revelation 9:9 Commentary: The Locusts' Iron Breastplates and Chariot Sound
Greek · 10 what the commentators say
Meaning in one sentence
Explore the military imagery of iron breastplates and chariot sounds in Revelation 9:9.
Research Summary
- Meaning: The locusts are armored and terrifying, their approach sounding like a full-scale chariot invasion.
- Key words: breastplates of iron (θώρακες σιδηροῦς), sound of wings (φωνὴ πτερύγων), chariots (ἅρματα), rushing to war (τρέχοντες εἰς πόλεμον).
- Main debate: Whether the locusts represent literal insects with symbolic intensification, a specific historical army (e.g., Saracens), or spiritual/demonic forces of judgment.
- Theological theme: Divine judgment is unstoppable and terrifying, using agents that are protected and overwhelming.
- Best use: Preaching and teaching on the seriousness of judgment and the certainty of God's final victory over evil.
Translation Comparison
BSB Berean Standard Bible 2020
They also had thoraxes like breastplates of iron, and the sound of their wings was like the roar of many horses and chariots rushing into battle.
WEB World English Bible 2000
They had breastplates like breastplates of iron. The sound of their wings was like the sound of many chariots and horses rushing to war.
KJV King James Version 1769
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.
ASV American Standard Version 1901
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 rushing to war.
YLT Young's Literal Translation 1898
and they had breastplates as breastplates of iron, and the noise of their wings is as the noise of chariots of many horses running to battle;
Darby Darby Bible 1890
and they had breastplates as breastplates of iron, and the sound of their wings [was] as the sound of chariots of many horses running to war;
Douay-Rheims Douay-Rheims Bible 1899
And they had breastplates as breastplates of iron: and the noise of their wings was as the noise of chariots and many horses running to battle.
Translations in other languages (10 available)
Y tenían corazas como corazas de hierro; y el estruendo de sus alas, como el ruido de carros que con muchos caballos corren á la batalla.
E tinham couraças como couraças de ferro; e o ruído de suas asas era como o ruído de carruagens de muitos cavalos correndo para a batalha.
Elles avaient des cuirasses comme des cuirasses de fer, et le bruit de leurs ailes était comme un bruit de chars à plusieurs chevaux qui courent au combat.
und hatten Panzer wie eiserne Panzer, und das Rasseln ihrer Flügel wie das Rasseln an den Wagen vieler Rosse, die in den Krieg laufen;
En zij hadden borstwapenen als ijzeren borstwapenen; en het gedruis hunner vleugelen was als een gedruis der wagens, wanneer vele paarden naar den strijd lopen.
E aveano degli usberghi come usberghi di ferro; e il rumore delle loro ali era come il rumore di carri, tirati da molti cavalli correnti alla battaglia.
A miały pancerze jako pancerze żelazne, a szum skrzydeł ich, jako grzmot wozów, gdy wiele koni bieży do bitwy.
На ней были брони, как бы брони железные, а шум от крыльев ее — как стук от колесниц, когда множество коней бежит на войну;
胸前有 甲，好像 鐵 甲。 牠們 翅膀 的聲音，好像 許多 車 馬 奔跑 上 陣 的聲音。
And they had breastplates like iron, and the sound of their wings was as the sound of carriages, like an army of horses rushing to the fight.
Verse in Context
Original Language (Koine Greek)
New Testament · Koine Greek · Revelation of John 9:9
Source: STEPBible TAGNT/TEHB (CC-BY 4.0). Click or tap a morphology code to see the full parsing.
Scholars' Consensus
Commentators across traditions agree that the breastplates and chariot sounds portray these locusts as an invincible army. Adam Clarke says the iron breastplates make the locusts "invulnerable, for no force availed against them." Barnes notes that the locust's naturally hard thorax becomes "an emblem of the breastplates of iron commonly worn by ancient warriors." The Cambridge Bible calls it an "idealisation of the structure of the natural locust." On the sound, Gill and Barnes both connect the noise of wings to Joel 2:5, which describes locusts leaping with the sound of chariots on the mountains. The consensus is that John takes real features of locusts, their hard thorax and loud wing-beats, and intensifies them with military imagery to communicate unstoppable judgment. Whatever these creatures represent, they are protected, they are terrifying, and their charge is irresistible.
How settled is the interpretation?
Interpretive difficulty: Medium
Main views:
- Literal locusts with intensified features: The locust's natural thorax and wing noise correspond; Cambridge calls it an 'idealisation'.
- Symbolic of a human army: Clarke and Barnes see the imagery pointing to human warriors; Gill identifies Saracens.
- Demonic/spiritual forces: Locusts come from the abyss; they have a king Abaddon/Apollyon, indicating demonic origin.
What is clear: The locusts are agents of divine judgment, protected and terrifying, and their advance signals an unstoppable woe.
What Scholars Agree and Debate
| Topic | Agreed | Debated |
|---|---|---|
| Identity of the locusts | They are agents of divine judgment released from the abyss. | Literal locusts with symbolic features (Cambridge) vs. a specific historical army like the Saracens (Gill) vs. demonic or spiritual forces. |
| Significance of the iron breastplates | Symbolize protective covering and invulnerability. | Whether this points to physical armor of a human army or supernatural defensive power that resists any attack. |
| Sound of wings like chariots | Denotes the overwhelming noise of a large advancing force. | Whether the comparison to chariots means the locusts are themselves a human army with chariots, or the noise is simply analogous to chariot sounds in an apocalyptic vision. |
| Connection to Joel 2 | John draws directly from Joel's locust plague imagery. | Whether the fulfillment was primarily in the past (Joel's own day) or is projected forward to the end-time fifth trumpet. |
Historical & Cultural Context
The fifth trumpet opens the abyss, releasing locusts with power to torment. For John's original readers, locust plagues were a familiar catastrophe. Ancient writers describe their terrifying advance: the sound of their wings could be heard for miles, and they moved like an army. Barnes quotes French traveler Volney: "The whole earth is covered with them for the space of several leagues. The noise they make … may be heard to a great distance, and resembles that of an army." Vincent cites Olivier comparing the noise to rain.
The OT background is Joel 2, where locusts are compared to horses and chariots rushing to battle. John intentionally echoes that passage to place his vision in Scripture's prophetic tradition. The breastplate was standard armor for ancient soldiers. By saying the locusts had "breastplates of iron," John stresses their imperviousness. Iron represented strength and unyielding defense. The sound of "many chariots and horses rushing to war" would evoke the terror of a full-scale invasion. In the ancient world, chariots were the ultimate weapon, fast, loud, deadly.
The locusts themselves are not normal insects. They come from the abyss, have human faces, women's hair, lion's teeth, scorpion's tails, and a king named Abaddon. The military imagery is part of a composite symbol that draws on familiar terrors to point to something supernatural. John's readers would recognize the language of holy war, where God uses even the most fearsome forces to bring judgment.
Textual Notes
The consulted sources note no significant textual variants for Revelation 9:9. The Greek text is consistent across the major witnesses represented in the supplied translations.
Reception History
From the early church through the Reformation, Revelation 9:9 has been read primarily through the lens of Joel 2. Many historicist commentators, such as Gill, identified the locusts with specific historical armies, in his view, the Saracen invasions of the seventh century, with their "iron breastplates" representing military armor and "chariot sound" the terror they inspired. Others, like Barnes, saw the imagery as a general symbol of any overwhelming invading force. In idealist interpretation, the details are timeless pictures of judgment's terror rather than maps of specific events. The verse has also been used in Christian art and hymnody to evoke the fear of the Lord.
Preaching This Verse
Three-point outline
- The Armor of Judgment. The iron breastplates speak of invulnerability. These locusts cannot be stopped by human resistance. Judgment comes with a protective covering that guarantees its mission.
- The Sound of Judgment. The noise of their wings like chariots announces their approach. There is no stealth here, judgment arrives with unmistakable terror.
- The March of Judgment. They rush to battle. Their movement is purposeful and swift. What God sends will not delay or turn back.
Five-point outline
- The OT Reminder. Joel 2:5 supplies the language of chariots and horse. John ties his vision to the prophetic tradition, what God did through locusts in Israel's history, he will do again.
- The Hybrid Nature. The locusts combine insect, human, animal, and military features. They are not one thing; they defy simple identification, pointing to a reality beyond natural plagues.
- The Iron Plating. The breastplates echo Job 40:18, where the behemoth's bones are like bars of iron. Nothing can pierce them.
- The Overwhelming Sound. The noise of chariots suggests not just an army but an army in full charge. Barnes notes Volney's description of locust noise "resembling an army foraging in secret."
- The Terror of the Lord. The fifth trumpet is a "woe." This verse shows why: divine judgment is not a minor inconvenience. It is a military campaign against human rebellion.
Illustration hooks
- The swarm. Volney's account of locusts covering leagues of land, their noise heard for miles, gives a visceral picture of the fifth trumpet. Describe watching from a hill as a dark cloud approaches.
- The sound of approaching war. The rumble of distant artillery, the drone of enemy aircraft, the vibration of tanks on a road, any sound that signals inevitable conflict. People who have heard war describe the sound in their bones.
- The unstoppable enemy. A tsunami, a wildfire, a pandemic, moments when human powerlessness becomes crystal clear. The locusts are like that, but with intent and purpose.
Questions your congregation is asking
- Are these literal locusts, or do they stand for something else?
- Is this judgment past, present, or future? Different traditions place it differently, some see it in the Jewish War, others in the spread of Islam, others still in a future tribulation.
- How can a God of love send terror like this? The Bible presents judgment as the other side of justice, when evil has reached its limit, God acts. This verse invites us to take sin seriously.
Leading a Discussion
This verse paints a vivid picture of judgment using familiar images of locusts and armies. Even the most terrifying forces in creation are under God's command. The locusts advance with purpose, protected and unstoppable. As you discuss, ask what this reveals about God's character and the seriousness of evil.
Discussion questions
- What specific details in verse 9 catch your attention? Why do you think John includes both the breastplates and the sound of wings?
- What Old Testament passage does this verse bring to mind? How does Joel 2 shape the way you read Revelation 9?
- Why would John compare the locusts' sound to chariots rushing to war? What does that communicate to a reader who has never seen a chariot?
- The locusts come from the abyss and have a king named Abaddon (v.11). How does that affect your understanding of their identity? Are they natural or supernatural?
- Does the military imagery make judgment feel more real or more distant? Explain.
- What does it mean that God uses such agents to carry out his purposes? How does this challenge or comfort you?
- How should this passage change the way we live today? What does it call us to do or remember?
Word Study
The key original-language words in this verse. Select any word for its full lexicon entry — meaning, every occurrence in Scripture, and related words.
Cross-References
Source: Treasury of Scripture Knowledge (TSK, public domain)
| Job 39:25 | As often as the trumpet sounds he snorts, ‘Aha!’ He smells the battle afar off, the thunder of the captains, and the shouting. |
| Job 40:18 | His bones are like tubes of bronze. His limbs are like bars of iron. |
| Job 41:23 | The flakes of his flesh are joined together. They are firm on him. They can’t be moved. |
| Job 41:30 | His undersides are like sharp potsherds, leaving a trail in the mud like a threshing sledge. |
| Isaiah 9:5 | For all the armor of the armed man in the noisy battle, and the garments rolled in blood, will be for burning, fuel for the fire. |
| Joel 2:5 | Like the noise of chariots on the tops of the mountains, they leap, like the noise of a flame of fire that devours the stubble, like a strong people set in battle array. |
| Joel 2:8 | One doesn’t jostle another. They each march in their own path. They burst through the defenses and don’t break ranks. |
| Nahum 2:4 | The chariots rage in the streets. They rush back and forth in the wide ways. Their appearance is like torches. They run like the lightnings. |
Interlinear and lexical data from STEPBible (CC BY 4.0). Cross-reference data from OpenBible.info (CC BY 4.0). Commentaries are public domain.
For personal reflection
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What the Commentators Say
10 public-domain commentaries, condensed into plain language.
Adam Clarke's Commentary Methodist/Wesleyan 1826
Clarke draws attention to the description of these creatures as seemingly invulnerable because of their iron-like breastplates. He notes that the sound of their wings comes from the clanging of weapons and military trappings, and he connects this image to Joel's prophecy of an invading army.
Barnes' Notes on the Bible Protestant 1832
Barnes emphasizes that the locusts' iron-like breastplates represent impenetrable defensive armor, not merely a hard shell. He also highlights that the sound of their wings, like chariots rushing to battle, unmistakably symbolizes a vast army marching to war. He reinforces this reading by noting that even a secular traveler like Volney independently described locusts' noise as resembling an army foraging.
Cambridge Bible for Schools and Colleges Anglican 1880
This commentator suggests that the image of locusts wearing iron breastplates is an idealized description drawn from the natural locust's actual body structure. The mention of chariots similarly echoes the language found in Joel 2:5.
Geneva Bible Notes Reformed 1599
And they had heare as the heare of women, and their teeth were as the teeth of lyons.
Gill's Exposition of the Bible Baptist 1748
Gill reads the iron breastplates as symbols of hardened hearts and worldly protections, not of righteousness. He applies this to both Saracen armies and Roman clergy, whose noisy wings represent their loud anathemas and excommunications raised against the truth rather than for it.
Jamieson-Fausset-Brown Commentary Protestant 1871
JFB points out that the "breastplates of iron" are not the natural thorax of a locust but something distinct. The sound of these creatures is compared to chariots, echoing Joel's description of an invading army. The Greek word for "battle" here means war, emphasizing their military role.
Lange's Commentary Reformed 1857
Lange reads the fallen star as a spiritual condition rather than a person or angel. He identifies it with repentance separated from faith, a faithless remorse that becomes religious self-torment and opens the abyss within the human soul. This
Matthew Henry's Commentary Reformed/Presbyterian 1710
Henry emphasizes that these demonic locusts act under strict divine restraint: they cannot touch the grass, trees, or the sealed, and they cannot kill, only torment for a set time. Their king, named Destroyer in both Hebrew and Greek, rules a realm whose power is real but carefully bounded by God.
Vincent's Word Studies Evangelical 1887
Vincent notes that the Greek word for stings (kentra) appears in classical literature for goads, spurs, and instrument tips, not just insect stings. He also points out that the Revised Version corrects the phrasing, reading "and stings; and in their tails is their power to hurt."
Wesley's Explanatory Notes Methodist/Wesleyan 1754
Wesley emphasizes the warlike, forceful nature of the cherubim's movement. The sound of their wings is not merely loud but specifically echoes the thunder of many horses drawing war chariots, suggesting they moved with urgent, weapon-like power.