Sahih Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Volume: 005 / Book Number: 059 / Hadith Number: 649
Narrated 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."