ذَٰلِكَ بِمَا قَدَّمَتْ أَيْدِيكُمْ وَأَنَّ ٱللَّهَ لَيْسَ بِظَلَّٰمٍۢ لِّلْعَبِيدِ
That is for what your hands have put forth [of evil] and because Allah is not ever unjust to His servants."
That, chastisement, is for what your hands have sent before you — He refers to this [their actions] exclusively with these [hands], because most actions are accomplished with them — and [know] that God is never unjust to His servants’, such that he would punish them for no sin.