It was easy for the nobles of Quraish to burn Buwaira whose sparks were flying in all directions, in the same connection was revealed the Qur'anic verse:" Whatever trees you have cut down or left standing on their trunks."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَطَعَ نَخْلَ بَنِي النَّضِيرِ وَحَرَّقَ وَلَهَا يَقُولُ حَسَّانُ وَهَانَ عَلَى سَرَاةِ بَنِي لُؤَىٍّ حَرِيقٌ بِالْبُوَيْرَةِ مُسْتَطِيرُ وَفِي ذَلِكَ نَزَلَتْ { مَا قَطَعْتُمْ مِنْ لِينَةٍ أَوْ تَرَكْتُمُوهَا قَائِمَةً عَلَى أُصُولِهَا} الآيَةَ  

So Allah, the Glorious and Exalted, revealed the verse:" Whatever trees you have cut down or left standing on their trunks, it was with the permission of Allah so that He may disgrace the evil-doers" (lix. 5). (Using translation from Muslim 1746a)   

رَسُولَ اللهِ ﷺ حَرَّقَ نَخْلَ بَنِي النَّضِيرِ وَقَطَعَ وَهِيَ الْبُوَيْرَةُ فَأَنْزَلَ اللهُ ﷻ {مَا قَطَعْتُمْ مِنْ لِينَةٍ أَوْ تَرَكْتُمُوهَا قَائِمَةً عَلَى أُصُولِهَا فَبِإِذْنِ اللهِ وَلِيُخْزِيَ الْفَاسِقِينَ} [الحشر 5]