Sahih al-Bukhari, Volume 6, Book 61, Hadith 565 (USC-MSA) ⓘ
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: Book 66, Hadith 69 (In-Book) & Hadith 5045 (DarusSalam)