Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, from Mukhawwal, from Abu Sa'd, who said: I saw Abu Rafi' come to al-Hasan ibn Ali while he was praying, and he had tied up his hair, so he released it or forbade him from that, and said: The Messenger of Allah, peace and blessings be upon him, "saw a man praying with his head tied up, and he forbade him," or he said: "The Messenger of Allah, peace and blessings be upon him, forbade a man from praying while his hair is tied up."