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

Through this chain of narration, from Al-Husayn ibn Sa’id, from Al-Qasim, from Aban, from Isma’il Al-Ju’fi, from Abu Ja’far عليه السلام, who said: Imam عليه السلام said: "The mustahadah (a woman experiencing irregular bleeding) observes the days of her regular menstrual cycle, then adds a precautionary day or two. If she sees purity, she performs ghusl. If she does not see purity, she performs ghusl and uses a cotton pad. She continues to pray with that ghusl until blood appears on the cotton pad. When the blood appears, she performs ghusl again and replaces the cotton pad."