Maliks Muwatta Book 016, Hadith Number 003.

Section : Washing the Dead.

Yahya related to me from Malik from Abdullah ibn Abi Bakr that Asma bint Umays washed Abu Bakr as-Siddiq when he died. Then she went out and asked some of the muhajirun who were there, "I am fasting and this is an extremely cold day. Do I have to do ghusl?" They said, "No."