Sahih al-Bukhari, Book 66, Hadith 69 (In-Book) ⓘ
Narrated Qatada: I asked Anas bin Malik about the recitation of the Prophet. He said, "He used to pray long (certain sounds) very much.
حَدَّثَنَا مُسْلِمُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا جَرِيرُ بْنُ حَازِمٍ الأَزْدِيُّ، حَدَّثَنَا قَتَادَةُ، قَالَ سَأَلْتُ أَنَسَ بْنَ مَالِكٍ عَنْ قِرَاءَةِ النَّبِيِّ، صلى الله عليه وسلم فَقَالَ كَانَ يَمُدُّ مَدًّا.
also referenced under: Hadith 5045 (DarusSalam) & Volume 6, Book 61, Hadith 565 (USC-MSA)