Menstrual Periods

Bukhari :: Book 1 :: Volume 6 :: Hadith 325

Narrated 'Aisha:

(the wife of the Prophet) I told Allah's Apostle that Safiya bint Huyai had got her menses. He said, "She will probably delay us. Did she perform Tawaf (Al-Ifada) with you?" We replied, "Yes." On that the Prophet told her to depart.