Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Bukhari :: Book 5 :: Volume 59 :: Hadith 684
Narrated 'Aisha:
(the wife of the Prophet) Safiya bin Huyai, the wife of the Prophet menstruated during Hajjat-ul-Wada' The Prophet said, "Is she going to detain us?" I said to him, "She has already come to Mecca and performed the Tawaf (ul-ifada) around the Ka'ba, O Allah's Apostle." The Prophet said, " Let her then proceed on (to Medina)."