Is it obligatory for a woman to perform ghusl, prayer, and fasting after the cessation of menstrual bleeding that lasts 8 or 9 days, given the presence of brown and black discharges that continue until the fifteenth or sixteenth day, and then she performs ghusl again upon the discharge of the white secretion (al-qassah al-bayda’)?

The cessation of blood during menstruation is not considered a state of purity as long as it is followed by black and brownish discharges connected to the menstrual blood. These discharges are considered part of menstruation, especially if the woman then sees the white discharge (al-qassah al-bayda') as a sign of purity. Aisha, may Allah be pleased with her, commanded women not to rush until they see the white discharge. According to the majority of scholars, yellowish and brownish discharges during the days of menstruation are considered menstruation. Therefore, one must wait to see the white discharge to confirm purity.