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 Muhammad ibn Al-Husayn, from Uthman ibn Isa, from Sama’ah, who said: Imam عليه السلام said: "The mustahadah (a woman experiencing irregular bleeding), if the blood soaks through the cotton pad, must perform ghusl for every two prayers and a separate ghusl for Fajr. If the blood does not pass through the cotton pad, she must perform ghusl once daily and perform wudu for every prayer. If her husband wishes to approach her, he may do so after she has performed ghusl. This applies when the blood is fresh (red). However, if it is yellowish, she is only required to perform wudu."