Chapter on the Rules of Menstruation, Istihadah, and Nifas, and Purification From Them

Through this chain of narration from the Shaykh (Al-Mufid), may Allah سبحانه وتعالى support him, from Abu al-Qasim Ja'far ibn Muhammad, from Muhammad ibn Ya'qub, from Muhammad ibn Yahya, from Ahmad ibn Muhammad, from Ibn Mahbub, from Abu Ayyub al-Khazzaz, from Muhammad ibn Muslim, from Abu Ja'far عليه السلام, who said: Imam عليه السلام said: "If a menstruating woman wishes to perform ghusl, she should insert a piece of cotton. If she finds any blood on it, she should not perform ghusl. If she finds nothing, she should perform ghusl. If she later observes a yellowish discharge, she should perform wudu and pray."