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

Through this chain of narration, from Muhammad ibn Ya’qub, from several of our companions, from Ahmad ibn Muhammad and Abu Dawood, from Al-Husayn ibn Sa’id, from Al-Nadr ibn Suwayd, from Muhammad ibn Abi Hamzah, from Yunus ibn Ya’qub, who said: I heard Abu Abdullah عليه السلام say: "The woman in a state of nifas (postnatal bleeding) sits for the duration of her usual menstrual cycle, then adds a precautionary period, performs ghusl, and begins praying."