Sahih Bukhari Volume 5, Book 59, Hadith Number 649.

Narrated By Abu Huraira : That during the Hajj in which the Prophet had made Abu Bakr As Siddiq as chief of the, Hajj before the Hajj-ul-Wida,’ on the day of Nahr, Abu Bakr sent him along with a group of persons to announce to the people. “No pagan is permitted to perform Hajj after this year, and nobody is permitted to perform the Tawaf of the Ka’ba naked.”