Chapter on Obligatory and Recommended Ritual Washing

And with this chain of transmission from Muhammad bin Ya'qub, from Muhammad bin Isma'il, from Al-Fadl bin Shadhan, from Hammad bin Isa and Ibn Abi Umayr, from Mu'awiyah bin Ammar, from Abu Abdullah عليه السلام: Imam عليه السلام said: "The mustahadah (a woman experiencing irregular bleeding) observes her usual days (of menstruation); during those days, she does not pray, and her husband does not approach her. When her usual days have passed and she still sees blood penetrating the cotton (used for checking), she performs ghusl (ritual bathing) for Dhuhr and Asr, delaying one and hastening the other. She performs one ghusl for Maghrib and Isha, delaying one and hastening the other. She then performs ghusl for Fajr, inserts a cloth for protection, wraps herself properly, does not bend forward, and keeps her thighs pressed together when she is in the mosque while the rest of her body remains outside. Her husband does not approach her during the days of her menstrual cycle. But if the blood does not penetrate the cotton, she performs wudu (ablution), enters the mosque, and prays each prayer with a fresh wudu. And this woman, her husband may approach her except during her menstrual days."