Narrated by the Shaykh (Al-Mufid), may Allah سبحانه وتعالى support him, from Abu al-Qasim Ja'far ibn Muhammad, from Muhammad ibn Ya'qub, from Ali ibn Ibrahim, from his father, from Abdullah ibn al-Mughira, from Ibn Muskan, from Muhammad al-Halabi, from a man, from Abu Abdullah عليه السلام, who said: Imam عليه السلام said: "A woman does not need to untie her hair when performing ghusl for janabah." (dependent on water reaching the roots)