ASSALAAMU ALAIKUM Sheikh,is there any evidence in the hadith of reciting Surah Fatiha 21 times as Ruqyah
All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
We do not know any evidence for performing Ruqyah with Al-Faatihah with this number, but the evidence is confirmed about the desirability of performing Ruqyah with Al-Faatihah, and the entire Quran is a cure as Allah Says (what means): {And We send down of the Qur'an that which is healing and mercy for the believers.} [Quran 17:82]
Nonetheless, if anyone has performed Ruqyah with this number and it was beneficial, then there is no harm in abiding by this number for the general saying of the Prophet : “Ruqyah is permissible as long as it does not involve any Shirk.” [Muslim]
For more benefit on Ruqyah, please refer to Fataawa 4310, 31469, 4678, 170973, and 117025.
Allah knows best.
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