ذٰلِكَ بِأَنَّ اللَّهَ لَم يَكُ مُغَيِّرًا نِعمَةً أَنعَمَها عَلىٰ قَومٍ حَتّىٰ يُغَيِّروا ما بِأَنفُسِهِم ۙ وَأَنَّ اللَّهَ سَميعٌ عَليمٌ

That is because Allah would not change a favor which He had bestowed upon a people until they change what is within themselves. And indeed, Allah is Hearing and Knowing.