9:40

إِلَّا تَنصُرُوهُ فَقَدْ نَصَرَهُ اللَّهُ إِذْ أَخْرَجَهُ الَّذِينَ كَفَرُوا ثَانِيَ اثْنَيْنِ إِذْ هُمَا فِي الْغَارِ إِذْ يَقُولُ لِصَاحِبِهِ لَا تَحْزَنْ إِنَّ اللَّهَ مَعَنَا فَأَنزَلَ اللَّهُ سَكِينَتَهُ عَلَيْهِ وَأَيَّدَهُ بِجُنُودٍ لَّمْ تَرَوْهَا وَجَعَلَ كَلِمَةَ الَّذِينَ كَفَرُوا السُّفْلَىٰ وَكَلِمَةُ اللَّهِ هِيَ الْعُلْيَا وَاللَّهُ عَزِيزٌ حَكِيمٌ

Transliteration:

Illa tansuroohu faqad nasarahu Allahu ith akhrajahu allatheena kafaroo thaniya ithnayni ith huma fee alghari ith yaqoolu lisahibihi la tahzan inna Allaha maAAana faanzala Allahu sakeenatahu AAalayhi waayyadahu bijunoodin lam tarawha wajaAAala kalimata allatheena kafaroo alssufla wakalimatu Allahi hiya alAAulya waAllahu AAazeezun hakeemun

Word by Word:

If not you help him, certainly, Allah helped him, when drove him out those who disbelieved, the second (of) the two, when they both (were) in the cave, when he said to his companion, "(Do) not grieve, indeed, Allah (is) with us." Then Allah sent down His tranquility upon him, and supported him with forces which you did not see, and made (the) word (of) those who disbelieved the lowest, while (the) Word (of) Allah it (is) the highest. And Allah (is) All-Mighty, All-Wise.

Translations:

If you do not succour the Apostle, then [know that God will do so -just as] God succoured him at the time when those who were bent on denying the truth drove him away, [and he was but] one of two: when these two were [hiding] in the cave, [and] the Apostle said to his companion, "Grieve not: verily, God is with us." And thereupon God bestowed upon him from on high His (gift of] inner peace, and brought utterly low the cause of those who were bent on denying the truth, whereas the cause of God remained supreme: for God is almighty, wise.

If ye help not (your leader), (it is no matter): for God did indeed help him, when the Unbelievers drove him out: he had no more than one companion; they two were in the cave, and he said to his companion, "Have no fear, for God is with us": t hen God sent down His peace upon him, and strengthened him with forces which ye saw not, and humbled to the depths the word of the Unbelievers. But the word of God is exalted to the heights: for God is Exalted in might, Wise.

If ye help him not, still Allah helped him when those who disbelieve drove him forth, the second of two; when they two were in the cave, when he said unto his comrade: Grieve not. Lo! Allah is with us. Then Allah caused His peace of reassurance to descend upon him and supported him with hosts ye cannot see, and made the word of those who disbelieved the nethermost, while Allah's Word it was that became the uppermost. Allah is Mighty, Wise.

If you help him not, Allah certainly helped him when those who disbelieved expelled him -- he being the second of the two when they were both in the cave, when he said to his companion: Grieve not, surely Allah is with us. So Allah sent down His tranquillity on him and strengthened him with hosts which you saw not, and made lowest the word of those who disbelieved. And the word of Allah, that is the uppermost. And Allah is Mighty, Wise.

If you do not aid the Prophet - Allah has already aided him when those who disbelieved had driven him out [of Makkah] as one of two, when they were in the cave and he said to his companion, "Do not grieve; indeed Allah is with us." And Allah sent down his tranquillity upon him and supported him with angels you did not see and made the word of those who disbelieved the lowest, while the word of Allah - that is the highest. And Allah is Exalted in Might and Wise.