وَنُنَزِّلُ مِنَ الْقُرْآنِ مَا هُوَ شِفَاء وَرَحْمَةٌ لِّلْمُؤْمِنِينَ وَلاَ يَزِيدُ الظَّالِمِينَ إَلاَّ خَسَارًا
[17:82]
And We reveal of the Quran that which is a healing and a mercy to the believers, and it adds only to the perdition of the unjust.
We send down (stage by stage) in the Qur'an that which is a healing and a mercy to those who believe: to the unjust it causes nothing but loss after loss.
And We reveal of the Qur'an that which is a healing and a mercy for believers though it increase the evil-doers in naught save ruin.