﴿ إِنَّ ٱلَّذِينَ يَكْفُرُونَ بِـَٔايَٰتِ ٱللَّهِ وَيَقْتُلُونَ ٱلنَّبِيِّۦنَ بِغَيْرِ حَقٍّۢ وَيَقْتُلُونَ ٱلَّذِينَ يَأْمُرُونَ بِٱلْقِسْطِ مِنَ ٱلنَّاسِ فَبَشِّرْهُم بِعَذَابٍ أَلِيمٍ ﴾

“Verily, as for those who deny the truth of God's messages, and slay the prophets against all right, and slay people who enjoin equity - announce unto them a grievous chastisement.”

(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.