Allah (SWT) is Ash-Shaafi, the One who heals. The Prophet ﷺ taught short supplications for asking Him for healing, for the sick we visit, and for our own afwa wal-afiya (pardon and well-being) every morning and evening.
Anni massaniya-d-durru wa Anta arhamu-r-rahimin.
“Indeed, adversity has touched me, and You are the Most Merciful of the merciful.”
Ayyub (AS) called on his Lord with these words after long illness and loss, and Allah (SWT) answered him and removed his hardship (21:84).
Allahumma inni as'aluka-l-'afwa wa-l-'afiyata fi-d-dunya wa-l-akhira. Allahumma inni as'aluka-l-'afwa wa-l-'afiyata fi dini wa dunyaya wa ahli wa mali. Allahumma-stur 'awrati wa amin raw'ati. Allahumma-hfadhni min bayni yadayya wa min khalfi, wa 'an yamini wa 'an shimali, wa min fawqi, wa a'udhu bi 'adhamatika an ughtala min tahti.
“O Allah, I ask You for pardon and well-being in this life and the next. O Allah, I ask You for pardon and well-being in my religion, my worldly affairs, my family, and my wealth. O Allah, conceal my faults and set my fears at ease. O Allah, guard me from in front of me and behind me, to my right and to my left, and from above me. I seek refuge in Your greatness lest I be taken unaware from beneath me.”
La ba'sa, tahur inshaAllah.
“No harm, a purification, if Allah wills.”
Also recommended to say seven times: 'As'alu-llaha-l-'Adheem, Rabba-l-'arshi-l-'adheem, an yashfiyak', I ask Allah (SWT) the Mighty, Lord of the Mighty Throne, to cure you.
Allahumma Rabba-n-nas, adhhibi-l-ba's, ishfihi wa Anta-sh-Shafi. La shifa'a illa shifa'uk, shifa'an la yughadiru saqama.
“O Allah, Lord of mankind, remove the suffering and heal, for You are the Healer. There is no healing except Your healing, a healing that leaves no illness behind.”
A direct Prophetic supplication asking Allah (SWT) to remove suffering and grant a complete healing that leaves no illness behind.
As'alu-llaha-l-'Adheem, Rabba-l-'Arshi-l-'Adheem, an yashfiyak.
“I ask Allah the Magnificent, Lord of the Magnificent Throne, to cure you.”
A short supplication to say seven times when visiting an ill Muslim whose final moment has not arrived, asking Allah (SWT), Lord of the Mighty Throne, to grant healing.
Bismi-llahi arqik, min kulli shay'in yu'dhik, min sharri kulli nafsin aw 'ayni hasid. Allahu yashfik. Bismi-llahi arqik.
“In the name of Allah, I perform ruqyah for you from everything that harms you, from the evil of every soul or envious eye. May Allah cure you. In the name of Allah, I perform ruqyah for you.”
An authentic ruqyah taught in Sahih Muslim, seeking Allah's healing and protection from harm and the envious eye without charms or unsupported formulas.
Bismillah (three times). A'udhu billahi wa qudratihi min sharri ma ajidu wa uhadhir (seven times).
“In the name of Allah. I seek refuge in Allah and in His power from the evil of what I feel and what I fear.”
Taught to 'Uthman ibn Abi al-'As when he complained of pain: place your hand where it hurts, say Bismillah three times, then the refuge seven times.