Sahih al-Bukhari · Hadith 2037

Retiring to a Mosque for Remembrance of Allah (I'tikaf)

Narrated `Aisha: One of the wives of Allah's Messenger (ﷺ) practiced I`tikaf with him while she had bleeding in between her periods and she would see red (blood) or yellowish traces, and sometimes we put a tray beneath her when she offered the prayer