اللَّهُمَّ إنٍّي ضَعيفٌ فَقَوِّ فِي رِضَاك ضَغْفي، وخُذْ إلى الخَيْرِ بِنَاصِيَتي، واجْعَلْ الإسْلامَ مُنتَهَى رِضَايَ. اللَّهُمَّ إنِّي ضَعِيفٌ فقَوِّني، وإنِّي ذَليلٌ فأعِزَّني، وإنِّي فَقِيرٌ فارْزُقْنِي

QURAN

قُرْآنٌ: قال الله تعالى: وَنُنَزِّلُ مِنَ الْقُرْآنِ مَا هُوَ شِفَاءٌ وَرَحْمَةٌ لِّلْمُؤْمِنِينَ [الإسراء: 82 ] والصحيح: أنَّ "من" ههنا لبيان الجنس لا للتبعيض.وقال تعالى: يَا أَيُّهَا النَّاسُ قَدْ جَاءَتْكُم مَّوْعِظَةٌ مِّن رَّبِّكُمْ وَشِفَاءٌ لِمَا فِى الصُّدُورِ[يونس: 57]. فالقرآنُ هو الشِّفاء التام مِن جميع الأدواء القلبية والبدنية، وأدواءِ الدنيا والآخرة، وما كُلُّ أحدٍ يُؤهَّل ولا يُوفَّق للاستشفاء به، وإذا أحسن العليل التداوىَ به، ووضعَه على دائه بصدقٍ وإيمان، وقبولٍ تام، واعتقادٍ جازم، واستيفاءِ شروطه، لم يُقاوِمْهُ الداءُ أبداً

وكيف تُقاوِمُ الأدواءُ كلامَ ربِّ الأرض والسماءِ الذى لو نزل على الجبال، لصَدَعَهَا، أو على الأرض، لقطعها، فما مِن مرضٍ من أمراض القُلُوبِ والأبدان إلا وفى القُرآن سبيلُ الدلالة على دوائه وسببه، والحِمية منه لمن رزقه الله فهماً فى كتابه. وقد تقدَّم فى أول الكلام على الطب بيانُ إرشاد القرآن العظيم إلى أُصوله ومجامعه التى هى حفظُ الصحة والحِميةُ، واستفراغُ المؤذى، والاستدلالُ بذلك على سائر أفراد هذه الأنواع. وأما الأدوية القلبية، فإنه يذكرها مُفصَّلةً، ويذكر أسبابَ أدوائها وعلاجها. قال: أَوَ لَمْ يَكْفِهِمْ أَنَّا أَنْزَلْنَا عَلَيْكَ الْكِتَابَ يُتْلَى عَلَيْهِمْ [العنكبوت: 51]، فمَن لم يَشْفِه القرآنُ، فلا شفاه الله، ومَن لم يَكفِه، فلا كفاه الله.

Ibn al-Qayyam wrote about Healing by Quran

The Holy Quran is the speech of Allah, revealed to His Prophet Muhammad صلى الله عليه وسلم and its recitation is considered as an act of worship.

Quran is a light and a source of certainty. It is the strong rope that connects people to Allah and the path of the righteous. It contains the stories of the earlier Prophets, illustrating how those who disobeyed them faced Allah's punishment and humiliation. The Heavy book narrates the miracles of Allah's power in this vast universe and explains the origin of mankind from a humble drop of fluid. It contains the principles of faith that should be embraced by every submissive heart, as well as the rulings of Shariah that distinguish between the permissible and the forbidden, and between falsehood and the manifest truth. Furthermore, Quran explains the Day of Judgment and the ultimate destiny of humans; whether to a fire of humiliation or to a paradise filled with rivers, gardens, and secure dwellings. Quran is a cure for hearts, offering light and insight to the blind, Allah says:

وَنُنَزِّلُ مِنَ ٱلْقُرْءَانِ مَا هُوَ شِفَآءٌ وَرَحْمَةٌ لِّلْمُؤْمِنِينَ ۙ وَلَا يَزِيدُ ٱلظَّـٰلِمِينَ إِلَّا خَسَارًا (إسراء ٨٢)

And We send down of the Quran; which is a Healing and Mercy for the believers, but it does not increase the wrongdoers except in loss. [Al-Isra: 82]

Ibn Kathir, in his Tafseer of this verse said: "Allah informs us about His Book, the Quran, which He revealed to His Messenger Muhammad صلى الله عليه وسلم. The Quran is one against which falsehood cannot prevail, neither from front nor from behind it. It is a revelation from the All-Wise, Worthy of Praise. Quran is a cure and mercy for the believers, healing what is in the hearts of doubt, hypocrisy, disbelief, deviation, and inclination. It cures all these ailments, and it also brings faith, wisdom, and the desire for goodness. However, this healing and mercy is only for those who believe in it, follow it, and embrace it. As for the disbelievers, they are only driven further away by hearing it, and the problem lies not with the Quran but with the disbeliever."

قُلْ هُوَ لِلَّذِينَ ءَامَنُوا۟ هُدًى وَشِفَآءٌ  ۖ وَٱلَّذِينَ لَا يُؤْمِنُونَ فِىٓ ءَاذَانِهِمْ وَقْرٌ وَهُوَ عَلَيْهِمْ عَمًى ۚ أُو۟لَـٰٓئِكَ يُنَادَوْنَ مِن مَّكَانٍ بَعِيدٍ (فصلت ٤٤)

"Say: It is, for those who believe, a guidance and a healing. But those who do not believe, in their ears is deafness, and it is upon them a blindness. Those are being called from a distant place." [Fussilat: 44]

يَـٰٓأَيُّهَا ٱلنَّاسُ قَدْ جَآءَتْكُم مَّوْعِظَةٌ مِّن رَّبِّكُمْ وَشِفَآءٌ لِّمَا فِى ٱلصُّدُورِ وَهُدًى وَرَحْمَةٌ لِّلْمُؤْمِنِينَ (يونس ٥٧)

"O mankind, there has come to you instruction from your Lord and healing for what is in the chests, and guidance and mercy for the believers." [Yunus: 57] 

Qur'an provides Hidaayah for people, leading them from misguidance to truth. Allah says: 

ذَٰلِكَ ٱلْكِتَـٰبُ لَا رَيْبَ ۛ فِيهِ ۛ هُدًى لِّلْمُتَّقِينَ (بقرة ٢)

This is the Book about which there is no doubt, a guidance for those conscious of Allah." [Al-Baqarah: 2] 

وَنَزَّلْنَا عَلَيْكَ ٱلْكِتَـٰبَ تِبْيَـٰنًا لِّكُلِّ شَىْءٍۢ وَهُدًى وَرَحْمَةً وَبُشْرَىٰ لِلْمُسْلِمِينَ (نحل ٨٩)

We have revealed to you the Book as an explanation of all things, a guide, a mercy, and good news for those who fully submit. [Nahl: 89]

وَكَذَٰلِكَ أَوْحَيْنَآ إِلَيْكَ رُوحًا مِّنْ أَمْرِنَا ۚ مَا كُنتَ تَدْرِى مَا ٱلْكِتَـٰبُ وَلَا ٱلْإِيمَـٰنُ وَلَـٰكِن جَعَلْنَـٰهُ نُورًا نَّهْدِى بِهِۦ مَن نَّشَآءُ مِنْ عِبَادِنَا ۚ وَإِنَّكَ لَتَهْدِىٓ إِلَىٰ صِرَاطٍ مُّسْتَقِيمٍ (شورى ٥٢)

And thus, We have revealed to you a Spirit [the Quran] of Our command. You did not know what is the Book or [what is] faith, but We have made it a light by which We guide whom We will of Our servants. And indeed, you guide to a straight path, [Shura: 52]

وقد روى ابن ماجه في سننه من حديث علي قال قال رسول الله - صلى الله عليه وسلم :خير الدواء القرآن

Ibn Majah also narrates from Ali (may Allah be pleased with him) that the Prophet صلى الله عليه وسلم said:  "The best remedy is Quran."

حَدَّثَنِي سُرَيْجُ بْنُ يُونُسَ، وَيَحْيَى بْنُ أَيُّوبَ، قَالاَ حَدَّثَنَا عَبَّادُ بْنُ عَبَّادٍ، عَنْ هِشَامِ، بْنِ عُرْوَةَ عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِذَا مَرِضَ أَحَدٌ مِنْ أَهْلِهِ نَفَثَ عَلَيْهِ بِالْمُعَوِّذَاتِ فَلَمَّا مَرِضَ مَرَضَهُ الَّذِي مَاتَ فِيهِ جَعَلْتُ أَنْفُثُ عَلَيْهِ وَأَمْسَحُهُ بِيَدِ نَفْسِهِ لأَنَّهَا كَانَتْ أَعْظَمَ بَرَكَةً مِنْ يَدِي ‏.‏ وَفِي رِوَايَةِ يَحْيَى بْنِ أَيُّوبَ بِمُعَوِّذَاتٍ ‏.‏

A'ishah Radi Allaho Anha reported that when any of the members of the household fell ill, Allah's Messenger صلى الله عليه وسلم used to blow over them by reciting Mu'awwidhaat (last 2 Surah of Quran), and when he suffered from illness of which he died, I used to blow over him and rubbed his body with his hands; for his hands had greater healing power than my hands. (Sahih Muslim 2192a)

وروى ابن حبان (6098) عَنْ عَائِشَةَ : أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ دَخَلَ عَلَيْهَا وَامْرَأَةٌ تُعَالِجُهَا، أَوْ تَرْقِيهَا، فَقَالَ: (عَالِجِيهَا بِكِتَابِ اللَّهِ)

It is also reported by Ibn Hibban (6098) that Aishah Radi Allaho Anha said: "The Messenger of Allah صلى الله عليه وسلم entered upon me while a woman was treating or reciting Ruqyah over me, and he said: 'Treat her with the Book of Allah.'”

To seek Shifa from Quran, it is (primarily) necessary that whatever the book of Allah orders as a command or prohibition must be adhered to. Ibn Al-Qayyam wrote :

فَالْقُرْآنُ هُوَ الشِّفَاءُ التَّامُّ مِنْ جَمِيعِ الْأَدْوَاءِ الْقَلْبِيَّةِ وَالْبَدَنِيَّةِ، وَأَدْوَاءِ الدُّنْيَا وَالْآخِرَةِ، وَمَا كُلُّ أَحَدٍ يُؤَهَّلُ وَلَا يُوَفَّقُ لِلِاسْتِشْفَاءِ بِهِ، وَإِذَا أَحْسَنَ الْعَلِيلُ التَّدَاوِيَ بِهِ، وَوَضَعَهُ عَلَى دَائِهِ بِصِدْقٍ وَإِيمَانٍ، وَقَبُولٍ تَامٍّ، وَاعْتِقَادٍ جَازِمٍ، وَاسْتِيفَاءِ شُرُوطِهِ، لَمْ يُقَاوِمْهُ الدَّاءُ أَبَدًا. وَكَيْفَ تُقَاوِمُ كَلَامَ رَبِّ الْأَرْضِ وَالسَّمَاءِ الَّذِي لَوْ نَزَلَ عَلَى الْجِبَالِ، لَصَدَّعَهَا، أَوْ عَلَى الْأَرْضِ، لَقَطَّعَهَا، فَمَا مِنْ مَرَضٍ مِنْ أَمْرَاضِ الْقُلُوبِ وَالْأَبْدَانِ إِلَّا وَفِي الْقُرْآنِ سَبِيلُ الدِّلَالَةِ عَلَى دَوَائِهِ وَسَبَبِهِ، وَالْحَمِيَّةِ مِنْهُ لِمَنْ رَزَقَهُ اللَّهُ فَهْمًا فِي كِتَابِهِ، وَقَدْ تَقَدَّمَ فِي أَوَّلِ الْكَلَامِ عَلَى الطِّبِّ بَيَانُ إِرْشَادِ الْقُرْآنِ الْعَظِيمِ إِلَى أُصُولِهِ وَمَجَامِعِهِ الَّتِي هِيَ حِفْظُ الصِّحَّةِ وَالْحِمْيَةُ، وَاسْتِفْرَاغُ الْمُؤْذِي، وَالِاسْتِدْلَالُ بِذَلِكَ عَلَى سَائِرِ أَفْرَادِ هذه الأنواع. قَالَ: أَوَلَمْ يَكْفِهِمْ أَنَّا أَنْزَلْنا عَلَيْكَ الْكِتابَ يُتْلى عَلَيْهِمْ» فَمَنْ لَمْ يَشْفِهِ الْقُرْآنُ، فَلَا شَفَاهُ اللَّهُ، وَمَنْ لَمْ يَكْفِهِ، فَلَا كَفَاهُ اللَّهُ.

Quran is a complete healing for all spiritual and physical diseases, and for the ailments of this world and the Hereafter. However, not everyone is granted the ability or success to seek healing through it. If the afflicted person treats himself with the Quran properly, applying it to his illness with sincerity, faith, full acceptance, firm belief and fulfilling its conditions, the illness can never resist it.

How could any ailment withstand the words of the Lord of the heavens and the earth, which, if revealed upon mountains, would cause them to crumble, or upon the earth, would split it apart? There is no disease of the heart or body for which the Quran does not provide guidance toward its remedy and protection, for those whom Allah has granted understanding of His Book.

Quran provides guidance on the basic principles of health preservation, prevention, and the elimination of harmful substances. These principles can be applied to various other types of ailments as well.

أَوَلَمْ يَكْفِهِمْ أَنَّآ أَنزَلْنَا عَلَيْكَ ٱلْكِتَـٰبَ يُتْلَىٰ عَلَيْهِمْ (العنكبوت ٥١)

Is it not sufficient for them that We have sent down to you the Book which is recited to them?"

(Surah Al-Ankaboot: 51)

Whoever are not healed by the Quran, may Allah never grant them healing. And whoever do not find sufficiency in it, may Allah never suffice them.