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."
Jami` at-Tirmidhi Book 1, Hadith 126
← Previous Hadith "Fatimah bint Abi-Hubaish came to the Prophet and said: 'O Messenger of Allah! I am a woman who suffers from persistent bleeding and I do not become clean. Shall I give up Salat?' He said: 'No. That is only a bIood vessel, it is not menstruation. When your menstruation begins then leave the Salat. And when it ends, then wash the blood from you and perform Salat."

Jami` at-Tirmidhi Book 1, Hadith 125 Next Hadith → Abu Eisa said: Sharik is alone in narrating this Hadith from Abu Al Yaqzan. I asked Muhammad (ibn Isma'il AI-Bukhari) about this Hadlth. I said: "Adiyy bin Thabit from his father, from his grandfather; what is the name of Adiyy's grandfather?" But Muhammad did not know his name. And I mentioned to Muhammad that Yahya bin Ma'in said his name is Dinar, and he did not contradict him. Ahmad and 1shaq said ahout the Mustahadah: If she performs Ghusl for every prayer that is more prudent for her, and if she performs Wudu for each prayer, then that is acceptable from her, and if she combines between two prayers with (one) Ghusl then that is acceptable.

Jami` at-Tirmidhi Book 1, Hadith 127