the Prophet said about the Mustahadah that she should: "Leave the Salat for the days of her period which she menstruates in, then perform Ghusl, and perform Wudu for every Salat, and observe Saum and perform Salat."
Reference: Jami` at-Tirmidhi 126 In-book : Book 1, Hadith 126 English translation : Vol. 1, Book 1, Hadith 126
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