13ذٰلِكَ بِأَنَّهُم شاقُّوا اللَّهَ وَرَسولَهُ ۚ وَمَن يُشاقِقِ اللَّهَ وَرَسولَهُ فَإِنَّ اللَّهَ شَديدُ العِقابِSyed V. AhamedThis is because they stood against Allah and His Messenger (Muhammad): And if any stand against Allah and His Messenger (Muhammad), Allah is strict in punishment.