Sahih Bukhari Volume 002, Book 026, Hadith Number 812.
Narated By 'Aisha : Safiya bint Huyay, the wife of the Prophet got her menses, and Allah's Apostle was informed of that. He said, "Would she delay us?" The people said, "She has already performed Tawaf-al-Ifada." He said, "Therefore she will not (delay us)."