Musnad Ahmad 1034:155

Abu Nu'aym narrated to us, Yunus narrated to us, from al-Walid ibn al-'Izar, who said: Hudhayfah said: I spent a night with the family of the Messenger of Allah, may Allah bless him and grant him peace. The Messenger of Allah, may Allah bless him and grant him peace, stood up to pray while he had one end of the quilt over him, and 'Aishah had the other end of it, and she was menstruating and not praying.