Muwatta Malik Book 8, Hadith 36
Yahya related to me from Malik that he had heard that A'isha, the
wife of the Prophet, may Allah bless him and grant him peace, used to
pray in a shift and head-covering.
Yahya related to me from Malik that he had heard from Jabir ibn Abdullah that the Messenger of Allah, may Allah bless him and grant him peace, said, "Let anyone who cannot find two garments pray in one garment and wrap himself in it, and if the garment is short, let him wrap it around his waist."
Malik said, "In my view it is preferable for someone who prays in a single shirt to put a garment or a turban over his shoulders."
Yahya related to me from Malik from Muhammad ibn Zayd ibn Qunfudh that his mother asked Umm Salama, the wife of the Prophet, may Allah bless him and grant him peace, "What clothes can a woman wear in prayer?" She said, "She can pray in a shift that reaches down and covers the top of her feet."