Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))

Bukhari :: Book 6 :: Volume 60 :: Hadith 394

Narrated Abu Ishaq:

A man asked Al-Aswad, 'is it 'Fahal min-Muddakir' or'..Mudhdhakir?" Al Aswad replied, 'I have heard Abdullah bin Masud reciting it, 'Fahal-min Muddakir'; I too, heard the Prophet reciting it 'Fahal-min-Muddakir' with 'd'.

Source materials are from the University of Southern California MSA site
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