Volume 6, Book 60, Number 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 ‘Fa –
hal-min-Muddakir’ with ‘d’.