What did the Prophet Muhammad (peace be upon him) recite regarding 'Fahal min-Muddakir'?
 Narrated Abu 'Is-haq:                     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'.