Quran english at taubah 40

إلا تنصروه فقد نصره الله إذ أخرجه الذين كفروا ثاني اثنين إذ هما في الغار إذ يقول لصاحبه لا تحزن إن الله معنا فأنزل الله سكينته عليه وأيده بجنود لم تروها وجعل كلمة الذين كفروا السفلى وكلمة الله هي العليا والله عزيز حكيم

Illa tansuroohu faqad nasarahuAllahu ith akhrajahu allatheena kafaroo thaniyaithnayni ith huma fee alghari ithyaqoolu lisahibihi la tahzan inna AllahamaAAana faanzala Allahu sakeenatahu AAalayhiwaayyadahu bijunoodin lam tarawha wajaAAala kalimata allatheenakafaroo assufla wakalimatu Allahi hiyaalAAulya wallahu AAazeezun hakeem

 
Sahih International
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.
Muhsin Khan
If you help him (Muhammad SAW) not (it does not matter), for Allah did indeed help him when the disbelievers drove him out, the second of two, when they (Muhammad SAW and Abu Bakr) were in the cave, and he (SAW) said to his companion (Abu Bakr): “Be not sad (or afraid), surely Allah is with us.” Then Allah sent down His Sakinah (calmness, tranquillity, peace, etc.) upon him, and strengthened him with forces (angels) which you saw not, and made the word of those who disbelieved the lowermost, while it was the Word of Allah that became the uppermost, and Allah is All-Mighty, All-Wise.
Pickthall
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.
Yusuf Ali
If ye help not (your leader), (it is no matter): for Allah 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 Allah is with us”: then Allah 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 Allah is exalted to the heights: for Allah is Exalted in might, Wise.
Shakir
If you will not aid him, Allah certainly aided 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 upon him and strengthened him with hosts which you did not see, and made lowest the word of those who disbelieved; and the word of Allah, that is the highest; and Allah is Mighty, Wise.
Dr. Ghali
In case ever you do not vindicate him, (The prophet) yet Allah readily vindicated him, as the ones who disbelieved drove him out the second of two, as the two were in the cavern, as he said to his companion, “Grieve not; surely Allah is with us. “Then Allah sent down His serenity on him and aided him with hosts you did not see; and He made the word of the ones who disbelieved the basest; and the Word of Allah is that (which) is The Uppermost; and Allah is Ever-Mighty, Ever-Wise.