صحيح البخاري Sahih Bukhari كتاب فضائل القرآن The Book of The Virtues of The Quran
بَابُ مَدِّ الْقِرَاءَةِ:

(29) Chapter. Prolonging certain sounds while reciting the Quran.

2 hadith
Hadith 5045
حَدَّثَنَا مُسْلِمُ بْنُ إِبْرَاهِيمَ ، حَدَّثَنَا جَرِيرُ بْنُ حَازِمٍ الْأَزْدِيُّ ، حَدَّثَنَا قَتَادَةُ ، قَالَ : " سَأَلْتُ أَنَسَ بْنَ مَالِكٍ عَنْ قِرَاءَةِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ؟ فَقَالَ : كَانَ يَمُدُّ مَدًّا " .
Narrated Qatada: I asked Anas bin Malik about the recitation of the Prophet. He said, "He used to pray long (certain sounds) very much.
Hadith Reference Sahih Bukhari / The Book of The Virtues of The Quran / Hadith: 5045
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة
Hadith 5046
حَدَّثَنَا عَمْرُو بْنُ عَاصِمٍ ، حَدَّثَنَا هَمَّامٌ ، عَنْ قَتَادَةَ ، قَالَ : سُئِلَ أَنَسٌ : " كَيْفَ كَانَتْ قِرَاءَةُ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ؟ فَقَالَ : كَانَتْ مَدًّا ، ثُمَّ قَرَأَ : بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ ، يَمُدُّ بِبِسْمِ اللَّهِ ، وَيَمُدُّ بِالرَّحْمَنِ ، وَيَمُدُّ بِالرَّحِيمِ " .
Narrated Qatada: Anas was asked, "How was the recitation (of the Qur'an) of the Prophet?' He replied, "It was characterized by the prolongation of certain sounds." He then recited: In the Name of Allah, the Most Beneficent, the Most Merciful prolonging the pronunciation of 'In the Name of Allah, 'the most Beneficent,' and 'the Most Merciful.
Hadith Reference Sahih Bukhari / The Book of The Virtues of The Quran / Hadith: 5046
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة