632 - Yusuf ibn Yahya said: "If she does not know the end of her menstruation that precedes the istihaadah, and it is ambiguous to her, I would command her to perform ghusl after three days, to fast, to pray, and for her husband to approach her, because the fundamental principle is that she is his wife; thus, I do not forbid him from having intercourse with her, except as a precaution based on [the assumption] that her menstruation lasts until the seventh day. Likewise, she should not perform circumambulation of the House (Tawaf) except based on that [same precaution], and she should make up the fasts [she missed] from the time of her minimum menstruation duration to the maximum."

633 - Ishaq ibn Ibrahim narrated to us, saying: Abd al-A'la narrated to us, from Yunus, from al-Hasan—regarding a woman whose menstrual cycles were seven days before she married, and when she married it increased to fifteen or thirteen—he said: "She should look at those days she used to menstruate before she married, and when they have passed, she should perform ghusl every day at the time of the Dhuhr prayer until the same time [the following day], perform wudu for every prayer, clean herself, and pray."

634 - Ishaq narrated to us, saying: Muhammad ibn Abi Adi informed us, from al-Ash'ath, from al-Hasan, who said: "The woman experiencing istihaadah leaves the prayer for the days of her menstruation, taking the average of her [usual] menstruation, then she performs ghusl."