ذَٰلِكَ بِأَنَّهُمْ شَآقُّوا۟ ٱللَّهَ وَرَسُولَهُۥ ۖ وَمَن يُشَآقِّ ٱللَّهَ فَإِنَّ ٱللَّهَ شَدِيدُ ٱلْعِقَابِ

That is because they acted in opposition to Allah and His Apostle, and whoever acts in opposition to Allah, then surely Allah is severe in retributing (evil).