Musnad Abu Ya'la al-Mawsili 219:5

Zuhayr narrated to us, Hashim ibn al-Qasim narrated to us, al-Layth narrated to us, he said: Yazid ibn Abi Habib narrated to me, from Suwayd ibn Qays, from Mu'awiyah ibn Hudayj, from Mu'awiyah ibn Abi Sufyan, that he asked his sister, Umm Habibah, the wife of the Prophet, may God bless him and grant him peace: "Did the Messenger of God, may God bless him and grant him peace, pray in the garment in which he had intercourse with you?" She said: "Yes, if he did not see any impurity on it."