In The Name of Allaah, The Most Merciful, The Bestower of Mercy

Allaah [The Most High] said:

وَنُنَزِّلُ مِنَ ٱلۡقُرۡءَانِ مَا هُوَ شِفَآءٌ۬ وَرَحۡمَةٌ۬ لِّلۡمُؤۡمِنِينَ‌ۙ

And We send down from the Qur’an that which is a healing and a mercy to those who believe (in Islamic Monotheism and act on it). [Soorah Al-Israa: Ayah 82]

There are three statements [of the scholars] regarding the Qur’aan being a healing: [a] It is a healing for misguidance due to what it contains of guidance; [b] It is healing for illnesses due to what it contains of blessings; [c] It is healing due to its explanation and clarification of the obligatory duties and rulings of the religion. [1]

The Qur’aan is a healing for the hearts. It heals the diseases of ignorance, doubt and scepticism.  Allaah [The Most High] has never revealed a cure that is neither more comprehensive and beneficial, nor greater and quicker in removing diseases than the Qur’aan. [2]

The Qur’aan contains a healing for all [diseases] of the heart, such the disease of Shubhah [i.e. an affair that is made to resemble truth but is falsehood in reality], ignorance, corrupt views, perversion and evil aims; for indeed the Qur’aan is gathered upon ‘Al-Ilm Al-Yaqeenee-i.e. Knowledge of Absolute Certainty’ by way of which every shubhah and affair of ignorance is removed. It contains an admonition and a reminder by way of which every desire that is in opposition to the command of Allaah is removed. It is a healing for the bodies from what is harmful to them and its illnesses.  As for it being a Mercy, it is due to the means and paths it guides to. If the servant acts [upon those means and follows those paths], he [or she] will be successful, receive Mercy, an everlasting happiness, reward in this worldly life and everlasting reward in the Hereafter.  [3]

It (i.e. the Qur’aan) combines healing for the diseases of the heart, such as doubt, hypocrisy and other than that. It is a healing for the bodies when utilised for ruqya, such as what took place in the story of the man who performed ruqya with Soorah Faatihah on a man who was stung [by a scorpion]…. [4]


References:

[1] Source: Zaadul Maseer Fee Ilm At-Tafseer of Ibnul Jawzi (rahimahullaah)—Tafseer Soorah al-Israa]

[2] Source: Al-Jawaab Al-Kaafee page 4

[3] Abridged and slightly paraphrased. [Source: For further details see Tayseer Al-Kareem Ar-Rahmaan Fee Tafseer Kalaam Al-Mannaan]

[4][Abridged and slightly paraphrased: Source: See ‘Adwaa Al-Bayaan–Tafseer Soorah Al-Israa: Ayah 82]