Surah Al-Israa, verse 82

وَنُنَزِّلُ مِنَ ٱلْقُرْءَانِ مَا هُوَ شِفَآءٌۭ وَرَحْمَةٌۭ لِّلْمُؤْمِنِينَ ۙ وَلَا يَزِيدُ ٱلظَّٰلِمِينَ إِلَّا خَسَارًۭا

And We send down of the Qur'an that which is healing and mercy for the believers, but it does not increase the wrongdoers except in loss.