﴿ كَدَأْبِ ءَالِ فِرْعَوْنَ ۙ وَٱلَّذِينَ مِن قَبْلِهِمْ ۚ كَفَرُوا۟ بِـَٔايَٰتِ ٱللَّهِ فَأَخَذَهُمُ ٱللَّهُ بِذُنُوبِهِمْ ۗ إِنَّ ٱللَّهَ قَوِىٌّۭ شَدِيدُ ٱلْعِقَابِ ﴾

“[To them shall happen.] the like of what happened to Pharaoh's people and those who lived before them: they denied the truth of God's messagesand so God took them to task for their sins. Verily, God is powerful, severe in retribution!”

The way of these people is like the way of Pharaoh’s folk and those before them they disbelieved in God’s signs and so God seized them with chastisement because of their sins the sentence beginning with kafarū ‘they disbelieved’ explains the previous one. Truly God is strong in what He wills severe in retribution.