Abu Ishaq reported:I saw a man asking Aswad b. Yazid who taught the Qur'an in the mosque: How do you recite the verse (fahal min muddakir) whether (the word muddakir) Is with (d) or (dh)? He (Aswad) said: It was with (d). I heard Abdullah b. Mas'ud saying that he had heard the Messenger of Allah (ﷺ) reciting (muddakir) with (d)

Ishaq is reported to have said on the authority of Aswad who quoted on the authority of 'Abdullah b. Mas'ud that the Messenger of Allah (ﷺ) used to recite these words as (fahal min muddakir)