﴿ أُذِنَ لِلَّذِينَ يُقَٰتَلُونَ بِأَنَّهُمْ ظُلِمُوا۟ ۚ وَإِنَّ ٱللَّهَ عَلَىٰ نَصْرِهِمْ لَقَدِيرٌ ﴾

“PERMISSION [to fight] is given to those against whom war is being wrongfully waged and, verily, God has indeed the power to succour them -:”

(Sanction is given unto those who fight) sanction has been given to the believers to fight the disbelievers of Mecca (because they have been wronged) the disbelievers of Mecca wronged them; (and Allah is indeed Able to give them victory) Allah is able to give the believers victory over their enemies;