Tirmidhi Book 47, Hadith 3172

حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا أَبُو أَحْمَدَ الزُّبَيْرِيُّ، حَدَّثَنَا سُفْيَانُ، عَنِ الْأَعْمَشِ، عَنْ مُسْلِمٍ الْبَطِينِ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، قَالَ:‏‏‏‏ لَمَّا أُخْرِجَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مِنْ مَكَّةَ قَالَ رَجُلٌ:‏‏‏‏ أَخْرَجُوا نَبِيَّهُمْ، ‏‏‏‏‏‏فَنَزَلَتْ:‏‏‏‏ أُذِنَ لِلَّذِينَ يُقَاتَلُونَ بِأَنَّهُمْ ظُلِمُوا وَإِنَّ اللَّهَ عَلَى نَصْرِهِمْ لَقَدِيرٌ ‏‏‏‏ 39 ‏‏‏‏ الَّذِينَ أُخْرِجُوا مِنْ دِيَارِهِمْ بِغَيْرِ حَقٍّ سورة الحج آية 39 ـ 40 النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَأَصْحَابُهُ.

Narrated Sa'eed bin Jubair: When the Prophet (ﷺ) was expelled from Makkah a man said: 'They have driven out their Prophet' so (the following) was revealed: Permission (to fight) is given to those who are fought against, because they have been wronged; and surely, Allah is able to give them victory. Those who have been expelled from their homes unjustly (22:39). [Those who were expelled were the Prophet (ﷺ) and his Companions.]