question #2 Sahih al-Bukhari 4871, Book 65, Hadith 392 : What is the significance of verifying the correct pronunciation of Quranic verses from reliable sources?

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 (ﷺ) reciting it
‘Fahal-min-Muddakir’ with ‘d’.