Yahya related to me from Malik from Hisham ibn Urwa from hisfather from Zaynab bint Abu Salama that she saw Zaynab bint Jahsh, thewife of Abd ar-Rahman ibn Awf, and she used to bleed as ifmenstruating. She would do ghusl and pray. (ID)
USC-MSA web (English) reference: Book 2, Hadith 108 (ID)
Arabic reference (ID): Book 2, Hadith 137 (ID)