إِنَّ ٱلَّذِينَ يَكْفُرُونَ بِـَٔايَٰتِ ٱللَّهِ وَيَقْتُلُونَ ٱلنَّبِيِّۦنَ بِغَيْرِ حَقٍّۢ وَيَقْتُلُونَ ٱلَّذِينَ يَأْمُرُونَ بِٱلْقِسْطِ مِنَ ٱلنَّاسِ فَبَشِّرْهُم بِعَذَابٍ أَلِيمٍ
Those who disbelieve in the signs of Allah and kill the prophets without right and kill those who order justice from among the people - give them tidings of a painful punishment.
(Lo! those who disbelieve the revelations of Allah) in Muhammad and the Qur'an, (and slay the Prophets) i.e. ally themselves with those who slay the prophets (wrongfully) without them having committed any crime, (and slay those of mankind) who believed in the prophets (who enjoin equity) Allah's divine Oneness: (promise them a painful doom) which will spread out to their hearts.