Evidence for Ruqyah in Hadith

These conditions can be found in 'Fath Al-Bari' and in the sayings of Shaykh al-Islam Ibn Taymiyyah concerning healing the one who is possessed.

Evidence can be found in the Sunnah of the Prophet ﷺ in regards to Ruqyah being allowed; this is encouraged in the following 

Awf Ibn Malik al-Ashja'i (RAA) narrated that he said to the Prophet: "O Allah's Messenger! We used to do Ruqyah during the days of Jahiliyyah (pre-Islamic era). What do you think of that?" He replied: "Present your Ruqyah to me; there is nothing wrong with it as long as it does not involve Shirk."

(Sahih Muslim)

Therefore, Ruqyah Shar'iyyah is permissible and legal in Islam.

Ruqyah was practiced before Islam - Even in the pre-Islamic era, people performed Ruqyah

The Prophet ﷺ approved of Ruqyah - He did not forbid the practice entirely

The condition: It must not involve Shirk - The only prohibition is when Ruqyah contains elements of polytheism

Ruqyah must be examined - The Prophet ﷺ said "Present your Ruqyah to me" indicating that the content matters

Islamic Ruqyah is encouraged - When done according to Shari'ah, it is a recommended practice

For Ruqyah to be permissible in Islam, it must meet the following conditions:

1. It must be with the words of Allah (Qur'an) - Using verses from the Qur'an Or authentic supplications from the Sunnah - Using duas taught by the Prophet ﷺ

2. It must be in Arabic or understood language - The person should understand what is being recited

3, It must not contain any Shirk - No polytheistic elements or seeking help from other than Allah, Belief that Ruqyah has no power by itself - Only Allah has the power to heal, Ruqyah is merely a means

The conditions and rulings regarding Ruqyah can be found in:

Fath Al-Bari - The famous commentary on Sahih Al-Bukhari by Ibn Hajar Al-Asqalani

Works of Shaykh al-Islam Ibn Taymiyyah - Concerning healing those who are possessed by Jinn

Sahih Muslim - The authentic hadith collection containing the narration of Awf Ibn Malik

Conclusion

Ruqyah is a blessed practice from the Sunnah of the Prophet ﷺ. When performed correctly, according to Islamic guidelines and free from any elements of Shirk, it is not only permissible but encouraged as a means of seeking healing and protection from Allah (SWT).

The key is to ensure that all Ruqyah practices are firmly rooted in the Qur'an and authentic Sunnah, with complete reliance on Allah alone for healing and protection.