Sahih al-Bukhari, Book 6, Hadith 16 (In-Book) ⓘ
Narrated `Aisha: One of the mothers of the faithful believers (i.e. the wives of the Prophet ) did I`tikaf while she was having bleeding in between her periods.
حَدَّثَنَا مُسَدَّدٌ، قَالَ حَدَّثَنَا مُعْتَمِرٌ، عَنْ خَالِدٍ، عَنْ عِكْرِمَةَ، عَنْ عَائِشَةَ، أَنَّ بَعْضَ، أُمَّهَاتِ الْمُؤْمِنِينَ اعْتَكَفَتْ وَهْىَ مُسْتَحَاضَةٌ.
also referenced under: Hadith 311 (DarusSalam) & Volume 1, Book 6, Hadith 308 (USC-MSA)