Isaiah 51:9 · Bible study
Isaiah 51:9 Commentary: Awake, O Arm of the Lord, Meaning & Context
Hebrew · 9 what the commentators say
Meaning in one sentence
Understand Isaiah's cry for God's arm to awake. See the meaning of Rahab and the dragon in this prayer for deliverance from exile.
Research Summary
- Meaning: A prayer for God to act powerfully as he did in the Exodus, defeating Egypt (Rahab).
- Key words: Awake (עוּר, H5782), Arm (זְרוֹעַ, H2220), Rahab (רַהַב, H7294), Dragon (תַּנִּין, H8577).
- Main debate: Whether Rahab is purely historical Egypt or also carries mythological overtones.
- Theological theme: God's faithful power to save his people based on past deliverance.
- Best use: In prayer and worship, recalling God's mighty acts to build faith for present trials.
Translation Comparison
BSB Berean Standard Bible 2020
Awake, awake, put on strength, O arm of the LORD. Wake up as in days past, as in generations of old. Was it not You who cut Rahab to pieces, who pierced through the dragon?
WEB World English Bible 2000
Awake, awake, put on strength, arm of Yahweh! Awake, as in the days of old, the generations of ancient times. Isn’t it you who cut Rahab in pieces, who pierced the monster?
KJV King James Version 1769
Awake, awake, put on strength, O arm of the Lord; awake, as in the ancient days, in the generations of old. Art thou not it that hath cut Rahab, and wounded the dragon?
ASV American Standard Version 1901
Awake, awake, put on strength, O arm of Jehovah; awake, as in the days of old, the generations of ancient times. Is it not thou that didst cut Rahab in pieces, that didst pierce the monster?
YLT Young's Literal Translation 1898
Awake, awake, put on strength, O arm of Jehovah, Awake, as in days of old, generations of the ages, Art not Thou it that is hewing down Rahab, Piercing a dragon!
Darby Darby Bible 1890
Awake, awake, put on strength, O arm of Jehovah; awake, as in the days of old, [as in] the generations of passed ages. Is it not thou that hath hewn Rahab in pieces, [and] pierced the monster?
Douay-Rheims Douay-Rheims Bible 1899
Arise, arise, put on strength, O thou arm of the Lord, arise as in the days of old, in the ancient generations. Hast not thou struck the proud one, and wounded the dragon?
Translations in other languages (10 available)
Despiértate, despiértate, vístete de fortaleza, oh brazo de Jehová; despiértate como en el tiempo antiguo, en los siglos pasados. ¿ No eres tú el que cortó á Rahab, y el que hirió al dragón?
Desperta-te! Desperta-te! Reveste-te de força, ó braço do SENHOR! Desperta-te como nos dias do passado, como nas gerações antigas; por acaso não és tu aquele que cortaste em pedaços a Raabe, que feriste ao dragão marinho?
Réveille-toi, réveille-toi! Revêts-toi de force, bras de l’ Éternel!
Wohlauf, wohlauf, ziehe Macht an, du Arm des HERRN! Wohlauf, wie vorzeiten, von alters her! Bist du es nicht, der die Stolzen zerhauen und den Drachen verwundet hat?
Ontwaak, ontwaak, trek sterkte aan, Gij arm des HEEREN! ontwaak als in de verledene dagen, als in de geslachten van ouds; zijt Gij het niet, Die Rahab uitgehouwen hebt, Die den zeedraak verwond hebt?
Risvegliati, risvegliati, rivestiti di forza, o braccio dell’Eterno! Risvegliati come ne’ giorni andati, come nelle antiche età! Non sei tu che facesti a pezzi Rahab, che trafiggesti il dragone?
Ocuć się, ocuć się, oblecz się w siłę, o ramię Pańskie! Ocuć się jako za dni dawnych, i za rodzajów przeszłych! Izaliś nie ty jest, któreś zgładziło Egipt, i zraniło smoka?
Восстань, восстань, облекись крепостью, мышца Господня! Восстань, как в дни древние, в роды давние! Не ты ли сразила Раава, поразила крокодила?
耶和華 的膀臂啊，興起！興起！以能力 為衣穿上，像古時 的年日、上古 的世代 興起一樣。從前砍碎 拉哈伯、刺透 大魚的，不 是 你嗎？
Awake! awake! put on strength, O arm of the Lord, awake! as in the old days, in the generations long past. Was it not by you that Rahab was cut in two, and the dragon Wounded?
Verse in Context
Original Language (Biblical Hebrew)
Old Testament · Biblical Hebrew · Isaiah 51:9
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 Isaiah 51:9 is an urgent prayer from the exiles (or the prophet on their behalf) calling on God to act as he did at the Exodus. The 'arm of Yahweh' symbolizes God's power to save. The triple repetition of 'Awake' (עוּרִי) stresses their desperate need for God to move from apparent inaction. 'Rahab' is consistently identified as Egypt (Barnes, Gill, Jamieson-Fausset-Brown, Keil & Delitzsch), and 'the dragon' (תַּנִּין) as Pharaoh or the nation itself, pictured as a sea monster (Gill; Barnes). The verse recalls how God 'cut Rahab in pieces' and 'pierced the monster', referring to the plagues and the destruction at the Red Sea. The underlying conviction: the same God who delivered from Egypt can deliver from Babylon.
How settled is the interpretation?
Interpretive difficulty: Medium
Main views:
- Historical Exodus Reference: Rahab clearly equals Egypt in other passages (Isa 30:7; Ps 87:4). The cutting and piercing refer to the plagues and Red Sea.
- Cosmic Mythological Victory: Rahab is a chaos monster (Job 26:12; Ps 89:10). The language evokes creation and cosmic battle, not just one historical event.
- Typological Prophecy: The arm of the Lord is interpreted as Christ (Matthew Henry). The deliverance from Egypt prefigures salvation from sin, a reading found in Christian tradition.
What is clear: The verse is a prayer calling on God's power to deliver based on his mighty act at the Exodus.
What Scholars Agree and Debate
| Topic | Agreed | Debated |
|---|---|---|
| Meaning of Rahab | Commentators agree Rahab refers to Egypt. | Some see it as a purely historical reference (Barnes, Gill); others note it also alludes to the mythological chaos monster (Keil & Delitzsch, Cambridge). |
| Identity of the Arm of the Lord | It is a poetic personification of God's power. | Some Christian commentators (Matthew Henry) identify it with Christ; others see it as a metaphor for God's saving action. |
| Nature of the Call, Prayer or Prophecy? | The passage is a cry for deliverance. | Is it the prayer of the exiles (Barnes, Cambridge) or a prophetic summons (Gill sees it as the church's prayer)? |
| The Dragon (Tannin) | The dragon represents Pharaoh or Egypt. | Some specify it is the king of Egypt (Jamieson-Fausset-Brown, Gill); others say it is the nation as a whole (Barnes). |
Historical & Cultural Context
Isaiah 51:9 is set in the Babylonian exile (6th century BC). The Israelites have been in captivity for decades. The preceding chapters (40, 51) offer comfort and promise of return. The prophet depicts the people crying out to God, whose arm seems asleep. The metaphor of God's 'arm' as a warrior's weapon is common in the Old Testament (Deuteronomy 4:34; Psalm 44:1). The language of 'Rahab' and 'dragon' draws on ancient Near Eastern imagery of chaos monsters, but here it is historicized: Rahab is a poetic name for Egypt (Isaiah 30:7), and the dragon likely refers to Pharaoh (Ezekiel 29:3). The Exodus, the defining saving event, is described in terms of a cosmic battle: God split the sea monster, then dried up the sea (v.10). This shows that God's victory over Egypt was a triumph over chaos and oppression.
The people's prayer is an act of remembrance: they recall the 'days of old' (Psalm 44:1) to fuel hope for a new exodus from Babylon. The repetition of 'awake' echoes other psalms where God is called to arise (Psalm 7:6). The exiles are not doubting God's power; they are pleading for him to exercise it again. The surrounding context (vv.12, 16) reinforces that God himself responds, assuring them of comfort and his sustaining presence.
Textual Notes
The consulted sources note no significant textual variants for Isaiah 51:9. The Hebrew text is stable across manuscripts. The main interpretive questions are lexical and theological, not textual.
Reception History
Throughout church history, this verse has been read as a call for God's saving power to be revealed. The Geneva Bible (1599) and Matthew Henry (1710) both saw the arm of the Lord as pointing to Christ, the agent of redemption. Reformation-era commentators emphasized God's faithfulness to his covenant promises. Modern scholarship has explored the mythological background of Rahab and the dragon while affirming the historical anchor in the Exodus. The verse has been cited in prayers for deliverance and hymns of hope, reminding believers that the God who defeated Egypt will not leave his people in bondage.
Preaching This Verse
Three-Point Outline
- The Cry for God to Awake, The triple “Awake” expresses deep longing and desperation. The people feel God is inactive and they urgently call for his intervention.
- The Arm of the Lord, God’s saving power personified. The arm is the instrument of deliverance, recalling past acts of strength.
- The Defeat of Rahab, The Exodus is the proof of God’s ability to save. By remembering Egypt’s defeat, the exiles ground their hope for a new deliverance from Babylon.
Five-Point Outline
- The Need: God seems asleep; his people are in bondage.
- The Petition: Awake, put on strength, a direct call for action.
- The Remembrance: “As in the days of old”, they base their plea on God’s history.
- The Declaration: “You cut Rahab in pieces, pierced the dragon”, they rehearse the specific victory.
- The Assurance: This same God will act again (leads into v.11, where joy replaces sorrow).
Illustration Hooks
- A child waking a parent in the middle of the night, urgently calling for help. The parent seems asleep but is ready to respond.
- A veteran remembering a past battle where they fought bravely, that memory stirs courage for a new fight.
- The image of a fire extinguisher mounted on a wall, it is there, but someone must grab it and use it in the emergency.
Questions Your Congregation Is Asking
- Does God ever seem distant or asleep when we need him most? How do we pray honestly about that feeling?
- How can remembering past victories, both biblical and personal, strengthen our faith for current struggles?
- Is the language of Rahab and the dragon just myth? How do we understand this ancient imagery today?
Leading a Discussion
This verse captures the raw cry of God's people when he seems slow to act. They call on his arm, his power, to wake up and do what only he can do. Yet they ground their prayer in history: the God who shattered Egypt can shatter Babylon.
Discussion Questions
- What is repeated three times in this verse, and why does it matter?
- Who is being addressed, only God, or something more specific?
- What is “Rahab” and what does it represent? How do the supplied commentaries help identify it?
- Why do the speakers call on the “arm” rather than on God directly?
- How does the memory of the Exodus shape their hope for deliverance from Babylon?
- When have you felt that God was not listening? How does this prayer model a way to express that honestly?
- What past acts of God, personal or from Scripture, can you recall to strengthen your trust in a difficult situation?
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)
| Deuteronomy 4:34 | Or has God tried to go and take a nation for himself from among another nation, by trials, by signs, by wonders, by war, by a mighty hand, by an outstretched arm, and by great terrors, according to all that Yahweh your God did for you in Egypt before your eyes? |
| Judges 6:13 | Gideon said to him, “Oh, my lord, if Yahweh is with us, why then has all this happened to us? Where are all his wondrous works which our fathers told us of, saying, ‘Didn’t Yahweh bring us up from Egypt?’ But now Yahweh has cast us off, and delivered us into the hand of Midian.” |
| Nehemiah 9:7 | You are Yahweh, the God who chose Abram, brought him out of Ur of the Chaldees, gave him the name of Abraham, |
| Nehemiah 9:15 | and gave them bread from the sky for their hunger, and brought water out of the rock for them for their thirst, and commanded them that they should go in to possess the land which you had sworn to give them. |
| Job 26:12 | He stirs up the sea with his power, and by his understanding he strikes through Rahab. |
| Psalms 7:6 | Arise, Yahweh, in your anger. Lift up yourself against the rage of my adversaries. Awake for me. You have commanded judgment. |
| Psalms 21:13 | Be exalted, Yahweh, in your strength, so we will sing and praise your power. |
| Psalms 44:1 | For the Chief Musician. By the sons of Korah. A contemplative psalm. We have heard with our ears, God; our fathers have told us what work you did in their days, in the days of old. |
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
Read the devotional page — prayer, application, and "for families"
What the Commentators Say
8 public-domain commentaries, condensed into plain language.
Barnes' Notes on the Bible Protestant 1832
Barnes sees this as the cry of exiles calling on God to end His apparent inactivity and rescue them as He once shattered Egypt. The "arm of the Lord" had seemed to sleep for seventy years, so they plead for the same power that cut Rahab and wounded the dragon to be stirred again.
Geneva Bible Notes Reformed 1599
The Geneva Note identifies Rahab as a name for Egypt and the dragon as Pharaoh. The call for the Lord’s arm to rise recalls His past victory at the Exodus. The plea asks God to repeat that same saving power in the present age.
Gill's Exposition of the Bible Baptist 1748
Gill interprets the cry "Awake, O arm of the Lord" as an urgent prayer to God the Father or to Christ, asking Him to display His power as He did in ancient days. He identifies Rahab as Egypt and the dragon as Pharaoh, and sees this same arm at work later in destroying Rome Pagan and the beast.
Jamieson-Fausset-Brown Commentary Protestant 1871
JFB identifies Rahab as a poetic name for Egypt and the dragon as the crocodile, an emblem of Egypt seen on Roman coins. The passage refers specifically to Pharaoh, the king of Egypt, as the one who is cut in pieces.
Keil & Delitzsch OT Commentary Protestant 1876
Keil-Delitzsch notes that the arm of Jehovah appears not lifeless but motionless, which is why the church cries out three times for it to awaken and clothe itself with strength. The call is grounded in past deliverance: the same arm that split Rahab and dried the Red Sea can surely accomplish the promised restoration of Zion.
Lange's Commentary Reformed 1857
Lange reads Isaiah 51 as a dramatic dialogue among four speakers: the veiled Servant of Jehovah, Israel, Jehovah Himself, and the prophet. Each addresses the redemption of Israel from their own viewpoint. The Servant first presents the condition for redemption, then Israel prays, the Lord answers, and finally the prophet exhorts the people to receive comfort.
Matthew Henry's Commentary Reformed/Presbyterian 1710
Matthew Henry identifies the "arm of the Lord" in this prayer as either Christ himself or God acting directly. He clarifies that God never actually sleeps, so the call for him to "awake" is a plea for him to show visibly that he is watching over his people and ready to rescue them.
Wesley's Explanatory Notes Methodist/Wesleyan 1754
Wesley identifies Rahab as a name for Egypt, drawn from its pride or strength. The dragon is Pharaoh, a title echoed in Psalm 74. He interprets the