Muwatta Malik Book 8, Hadith 29
Yahya related to me from Malik that he had heard that AIi ibn Abi
Talib and Abdullah ibn Abbas used to say, "The middle prayer is the
prayer of subh."
Malik said, "Out of all that I have heard
about the matter, I prefer what Ali ibn Abi Talib and Abdullah ibn
Abbas said."
Yahya related to me from Malik from Da'ud ibn al-Husayn that Ibn Yarbu al-Makhzumi said, "I heard Zayd ibn Thabit say, 'The middle prayer is the prayer of dhuhr.' "
Yahya related to me from Malik from Hisham ibn Urwa from his father that Umar ibn Abi Salama saw the Messenger of Allah, may Allah bless him and grant him peace, praying in one garment in the house of Umm Salama. He was completely covered by it, and had put both ends over his shoulders.