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.  

ذَٰلِكَ بِأَنَّ اللَّهَ لَمْ يَكُ مُغَيِّرًا نِعْمَةً أَنْعَمَهَا عَلَىٰ قَوْمٍ حَتَّىٰ يُغَيِّرُوا مَا بِأَنْفُسِهِمْ ۙ وَأَنَّ اللَّهَ سَمِيعٌ عَلِيمٌ  

˹Theirs is˺ like the custom of the people of Pharaoh and of those before them. They denied the signs of their Lord, so We destroyed them for their sins, and We drowned the people of Pharaoh. And all ˹of them˺ were wrongdoers.  

كَدَأْبِ آلِ فِرْعَوْنَ ۙ وَالَّذِينَ مِنْ قَبْلِهِمْ ۚ كَذَّبُوا بِآيَاتِ رَبِّهِمْ فَأَهْلَكْنَاهُمْ بِذُنُوبِهِمْ وَأَغْرَقْنَا آلَ فِرْعَوْنَ ۚ وَكُلٌّ كَانُوا ظَالِمِينَ