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

father, from Sa’d ibn Abdullah, from Ahmad ibn Muhammad ibn Isa, from Muhammad ibn Amr, from Yunus, who said: I asked Abu Abdullah عليه السلام about a woman who gave birth and then saw blood for a duration longer than what she was accustomed to seeing. Imam عليه السلام said: "She should refrain from prayer for the duration of her usual menstrual period, then add up to ten precautionary days. If she sees fresh, flowing blood, she must perform ghusl at the time of every prayer. If she sees yellowish discharge, she should perform wudu and then pray."