Sahih Bukhari
Sahih Bukhari Volume 006, Book 061, Hadith Number 565.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 61. Virtues of The Qur'an
Narrated By Qatada : I asked Anas bin Malik about the recitation of the Prophet. He said, "He used to pray long (certain sounds) very much.