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Surah 9. Al-Tawba
Ayah 25 - 27
٢٥. لَقَدْ نَصَرَكُمُ ٱللَّهُ فِى مَوَاطِنَ كَثِيرَةٍ ۙ وَيَوْمَ حُنَيْنٍ ۙ إِذْ أَعْجَبَتْكُمْ كَثْرَتُكُمْ فَلَمْ تُغْنِ عَنكُمْ شَيْـًٔا وَضَاقَتْ عَلَيْكُمُ ٱلْأَرْضُ بِمَا رَحُبَتْ ثُمَّ وَلَّيْتُم مُّدْبِرِينَ
٢٦. ثُمَّ أَنزَلَ ٱللَّهُ سَكِينَتَهُۥ عَلَىٰ رَسُولِهِۦ وَعَلَى ٱلْمُؤْمِنِينَ وَأَنزَلَ جُنُودًا لَّمْ تَرَوْهَا وَعَذَّبَ ٱلَّذِينَ كَفَرُوا۟ ۚ وَذَٰلِكَ جَزَآءُ ٱلْكَـٰفِرِينَ
٢٧. ثُمَّ يَتُوبُ ٱللَّهُ مِنۢ بَعْدِ ذَٰلِكَ عَلَىٰ مَن يَشَآءُ ۗ وَٱللَّهُ غَفُورٌ رَّحِيمٌ
[25-27] Allah has helped you on many occasions before this; (recently you witnessed the glory of His help23 ) on the day of the Battle of Hunain; you were proud of your great numbers which had deluded you but it availed you nothing and the earth, with all its vastness, became too narrow for you, and turning your backs, you fled. Then Allah sent down His sakinat (peace and tranquility) upon His Messenger and the Believers and sent (to your aid) forces which you could not see and chastised those who denied the Truth: for this is the due recompense of those who deny the Truth. Then (you have also seen that) after giving chastisement like this, Allah guides to repentance whom He wills:24 Allah is Forgiving and Merciful.
23This has been mentioned to allay the fears of those who were afraid of the consequences of the Declaration of the abrogation of the treaties, as if to say, "Why are you afraid of war? That Allah, Who helped you in far worse and dangerous situations on so many occasions before this, is there even now to help you. Had this Mission depended on your might, it could not have come out victorious in the hard trials at Makkah nor in the Battle of Badr when the odds were heavily against you. This is because Allah's Power has been helping you, and past experiences have shown you how effective that Power is. Rest assured that the same Power will help you to succeed in your Mission."
The Battle of Hunain had taken place in the valley of Hunain between Ta'if and Makkah in the month of Shawwal A.H. 8, a year or so before the Revelation of this discourse. This was the first battle in which the Muslim army consisted of 12,000 fighters and this far outnumbered the army of the disbelievers. But in spite of this the archers of the Hawazin clan wrought havoc among the Muslim army and put them to rout. The Holy Prophet and a few of his bravest Companions, however, firmly stood their ground and rallied the routed army, and ultimately won the victory. It was because of their perseverance that the army reassembled and the Muslims ultimately won the victory; otherwise they would have lost much more at Hunain than they had gained by the conquest of Makkah.
24".....Allah enables .....to repent" refers to the large number of the disbelievers who embraced Islam after the victory at Hunain as a result of the kind and generous treatment they received from the Holy Prophet, in spite of their former antagonism. This was mentioned to allay the anxiety of those new Muslims who feared that, as a result of the Declaration, all of their mushrik relatives would be put to death. (E.N. 16). They have been told to expect, in the light of the previous experiences, that the mushriks would be obliged to accept Islam, when they realize that neither any hope of the revival of the order of 'ignorance' was Ieft nor of any props to support it.