وَعَنْ قَتَادَةَ
قَالَ: سُئِلَ أَنَسٌ: كَيْفَ كَانَتْ قِرَاءَةُ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ: كَانَت مدا مَدًّا ثُمَّ قَرَأَ: بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ يَمُدُّ بِبَسْمِ اللَّهِ وَيَمُدُّ بِالرَّحْمَنِ وَيَمُدُّ بِالرَّحِيمِ
When Anas was asked how the Prophet (sallallahu alayhi wa sallam) recited the Qur’an he replied that he did so prolonging the words. Then he recited “In the name of God, the Compassionate, the Merciful,” prolonging each phrase. Bukhari transmitted it.
Mishkat al-Masabih 2095, Book 9, The Excellent Qualities of the Qur'an, Hadith 81. 1 min read