Beautiful Quran Recitation of surah fathiha in seven different dialect by brother haneef and salaf

Do you know Quran was revealed in 7 different dialects to Prophet?
Question for Viewers :
During whose period other dialects were abandoned and quraish dialect was selected for muslim to avoid the separation and fitnah among Muslim?

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Good question, who. Ali or Umar?

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Abu bakar?