Chapter on Menstruation, Istihada (abnormal bleeding), and Nifas (postpartum bleeding)

Ali ibn al-Hasan ibn Faddal narrated from Ali ibn Asbat, from Ya'qub al-Ahmar, from Abu Basir: Abu Abdillah عليه السلام said: "The woman in postpartum bleeding (nifas) who experiences prolonged days of bleeding should remain (abstain from prayers) for the same number of days that she used to sit (refrain) before. Then, she should add (as a precaution) the same number of days as her mother's nifas period, after which she must perform ghusl, use a cloth (to prevent leakage), and act as a woman experiencing istihada (irregular bleeding). However, if she does not know the duration of her nifas and is afflicted by prolonged bleeding, she should observe the same period as her mother, sister, or maternal aunt, and then add two-thirds of that time as a precaution. Afterward, she must act as a woman in istihada by using a cloth and performing ghusl."