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

Through this chain of narration, from Muhammad ibn Ya’qub, from Muhammad ibn Yahya, from Ahmad ibn Muhammad, from Ibn Faddal, from Ibn Bukayr, from Zurara, from Abu Abdullah عليه السلام, who said: Imam عليه السلام said: "The woman in a state of nifas (postnatal bleeding) refrains for the duration of her usual menstrual cycle and then adds two precautionary days."