Sahih Bukhari Volume 2, Book 26, Hadith Number 698.

Narated By Um Salama : I informed Allah’s Apostle that I was sick. He said, “Perform Tawaf (of the Kaba) while riding behind the people.” So, I performed the Tawaf while Allah’s Apostle was offering the prayer beside the Kaba and was reciting Surat-at-Tur.