Musnad Abu Ya'la al-Mawsili 109:106

Muhammad ibn al-Khattab narrated to us, Mu'ammal narrated to us, Sufyan narrated to us, from Abu al-Zubayr, from Jabir, who said: I entered upon the Prophet, may Allah bless him and grant him peace, while he was praying in a single garment, having wrapped himself in it. Abu al-Zubayr said: I saw Jabir praying in a single garment, having wrapped himself in it.