ذَٰلِكَ بِأَنَّهُمۡ شَآقُّواْ ٱللَّهَ وَرَسُولَهُۥۖ وَمَن يُشَآقِّ ٱللَّهَ فَإِنَّ ٱللَّهَ شَدِيدُ ٱلۡعِقَابِ
That is because they made a breach with God and His Messenger; and whosoever makes a breach with God, God is terrible in retribution
Author: A. J. Arberry