Pilgrimmage (Hajj)
Bukhari :: Book 2 :: Volume 26 :: Hadith 686
Narrated Um Salama:
(the wife of the Prophet) I informed Allah's Apostle that I was ill. So he said, "Perform the Tawaf while riding behind the people." I did so, and at that time the Prophet was praying beside the Ka'ba and reciting Surat-at-Tur.