The Book of Menstruation (Kitab Al-Haid)
Muslim :: Book 3 : Hadith 729
Anas reported: When the Messenger of Allah (may peace be upon him) entered the privy, and in the hadith transmitted by Hushaim (the words are): When the Messenger of Allah (may peace be upon him) entered the lavatory, be used to say: O Allah, I seek refuge in Thee from wicked and noxious things.
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