What is the ruling on ghusl if a brownish discharge appears after dryness and performing ghusl, and the dryness continues until the next day? Is ghusl obligatory again?

If the brownish discharge (al-kudrah) appeared during the usual period of menstruation, then it is considered menstruation, and the ghusl (ritual bath) must be redone. However, if it appeared after the completion of the usual period, then it is not considered menstruation, and the ghusl is valid. If it is uncertain whether it appeared after the ghusl, then it is assumed to have appeared before purification, and there is no need to repeat the ghusl.