Musannaf Ibn Abi Shayba 3:1050

Muhammad ibn Bishr narrated to us, he said: Mis'ar narrated to us, from Muharib ibn Dithar, from Jabir ibn Abdullah, he said: I came to the Messenger of Allah, may Allah bless him and grant him peace, while he was in the mosque. He said: "Pray two rak'ahs."