Word by Word Analysis

وَمَآ أَرْسَلْنَا مِن رَّسُولٍ إِلَّا لِيُطَاعَ بِإِذْنِ ٱللَّهِ ۚ وَلَوْ أَنَّهُمْ إِذ ظَّلَمُوٓا۟ أَنفُسَهُمْ جَآءُوكَ فَٱسْتَغْفَرُوا۟ ٱللَّهَ وَٱسْتَغْفَرَ لَهُمُ ٱلرَّسُولُ لَوَجَدُوا۟ ٱللَّهَ تَوَّابًا رَّحِيمًا 64

And We did not send any messenger except to be obeyed by permission of Allāh. And if, when they wronged themselves, they had come to you, [O Muḥammad], and asked forgiveness of Allāh and the Messenger had asked forgiveness for them, they would have found Allāh Accepting of Repentance and Merciful.