Malik related to me from Yahya ibn Said that A'isha, the wife ofthe Prophet, may Allah bless him and grant him peace, said, "TheMessenger of Allah, may Allah bless him and grant him peace, used topray the two rakas of the dawn (fajr) so quickly that I would say tomyself 'Has he recited the umm al-Qur'an or not?' "
App reference: Book 7, Hadith 30
USC-MSA web (English) reference: Book 7, Hadith 30
Arabic reference: Book 7, Hadith 284