“When the Prophet was expelled from Makkah, Abu Bakr said to him: ‘They have driven out their Prophet, verily to Allah we belong and to Him we return. They are surely doomed.’ Then it was revealed: ‘Permission to fight (against disbelievers) is given to those (believers) who are fought against, because they have been wronged; and surely, Allah is able to give them (believers) victory.’ Then I knew that there would be fighting.” Ibn Abbas said: “This is the first Verse that was revealed concerning fighting.”  

لَمَّا أُخْرِجَ النَّبِيُّ ﷺ مِنْ مَكَّةَ قَالَ أَبُو بَكْرٍ أَخْرَجُوا نَبِيَّهُمْ إِنَّا لِلَّهِ وَإِنَّا إِلَيْهِ رَاجِعُونَ لَيَهْلِكُنَّ فَنَزَلَتْ { أُذِنَ لِلَّذِينَ يُقَاتَلُونَ بِأَنَّهُمْ ظُلِمُوا وَإِنَّ اللَّهَ عَلَى نَصْرِهِمْ لَقَدِيرٌ } فَعَرَفْتُ أَنَّهُ سَيَكُونُ قِتَالٌ قَالَ ابْنُ عَبَّاسٍ فَهِيَ أَوَّلُ آيَةٍ نَزَلَتْ فِي الْقِتَالِ  

[Machine] When the Messenger of Allah ﷺ left Makkah, Abu Bakr said, "Indeed, to Allah we belong and to Him we shall return." [Quran 2:156] The Messenger of Allah ﷺ was expelled to be destroyed, so this verse was revealed, "Permission [to fight] has been granted to those who are being fought, because they were wronged. And indeed, Allah is competent to give them victory. Those who have been expelled from their homes unjustly" [Quran 22:39-40]. Abu Bakr realized that there would be a battle.  

لَمَّا خَرَجَ رَسُولُ اللَّهِ ﷺ مِنْ مَكَّةَ قَالَ أَبُو بَكْرٍ {إِنَّا لِلَّهِ وَإِنَّا إِلَيْهِ رَاجِعُونَ} [البقرة 156] أُخْرِجَ رَسُولُ اللَّهِ ﷺ لَيَهْلِكَنَّ قَالَ فَنَزَلَتْ هَذِهِ الْآيَةُ {أُذِنَ لِلَّذِينَ يُقَاتَلُونَ بِأَنَّهُمْ ظُلِمُوا وَإِنَّ اللَّهَ عَلَى نَصْرِهِمْ لَقَدِيرٌ الَّذِينَ أُخْرِجُوا مِنْ دِيَارِهِمْ بِغَيْرِ حَقٍّ} [الحج 40] عَرَفَ أَبُو بَكْرٍ أَنَّهُ سَيَكُونُ قِتَالٌ  

“When the Prophet was expelled from Makkah, Abu Bakr said to him: ‘They have driven out their Prophet, verily to Allah we belong and to Him we return. They are surely doomed.’ Then it was revealed: ‘Permission to fight (against disbelievers) is given to those (believers) who are fought against, because they have been wronged; and surely, Allah is able to give them (believers) victory.’ Then I knew that there would be fighting.” Ibn Abbas said: “This is the first Verse that was revealed concerning fighting.” (Using translation from Nasāʾī 3085)   

لَمَّا أُخْرِجَ النَّبِيُّ ﷺ مِنْ مَكَّةَ قَالَ أَبُو بَكْرٍ أَخْرَجُوا نَبِيَّهَمْ إِنَّا لِلَّهِ وَإِنَّا إِلَيْهِ رَاجِعُونَ لَيَهْلِكُنَّ فَأَنْزَلَ اللَّهُ تَعَالَى {أُذِنَ لِلَّذِينَ يُقَاتَلُونَ بِأَنَّهُمْ ظُلِمُوا وَإِنَّ اللَّهَ عَلَى نَصْرِهِمْ لَقَدِيرٌ} [الحج 39] قَالَ «وَهِيَ أَوَّلُ آيَةٍ نَزَلَتْ فِي الْقِتَالِ»  

[Machine] When the Messenger of Allah ﷺ left Makkah, Abu Bakr said, "Indeed, we belong to Allah, and indeed to Him we will return." The Messenger of Allah ﷺ was expelled so that he could be destroyed entirely. But when this verse was revealed, "Permission [to fight] has been given to those who are being fought, because they were wronged. And indeed, Allah is competent to give them victory. [They are] those who have been expelled from their homes," Abu Bakr knew that there would be fighting.  

لَمَّا خَرَجَ رَسُولُ اللهِ ﷺ مِنْ مَكَّةَ قَالَ أَبُو بَكْرٍ إِنَّا لِلَّهِ وَإِنَّا إِلَيْهِ رَاجِعُونَ أُخْرِجَ رَسُولُ اللهِ ﷺ لَيَهْلِكُنَّ جَمِيعًا فَلَمَّا أُنْزِلَتْ هَذِهِ الْآيَةُ {أُذِنَ لِلَّذِينَ يُقَاتَلُونَ بَأَنَّهُمْ ظُلِمُوا وَإِنَّ اللهَ عَلَى نَصْرِهِمْ لَقَدِيرٌ} {الَّذِينَ أُخْرِجُوا مِنْ دِيَارِهِمْ} عَرَفَ أَبُو بَكْرٍ أَنَّهُ سَيَكُونُ قِتَالٌ