Umm Salama said that she complained to God’s messenger of being ill, and he told her to perform the circumambulation behind the people riding. She did so, and God’s messenger was praying towards the side of the House and reciting,“By at-Tur and a Book inscribed.”(Qur’an, 52. The text here has bit-Tur, whereas the Qur’an has wat-Tur. Bukhari has wat- Tur in Hajj, 64, but he has bit-Tur ,in Salat, 78, Hajj, 74, and Tafsir Surat at-Tur, 1). (Bukhari and Muslim)