كتاب المغازى
64
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
(66)
Chapter: The Hajj in which Abu Bakr led the people
(66)
باب حَجُّ أَبِي بَكْرٍ بِالنَّاسِ فِي سَنَةِ تِسْعٍ
Sahih al-Bukhari 4363

Narrated Abu Huraira:

That during the Hajj in which the Prophet (ﷺ) 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."

حَدَّثَنَا سُلَيْمَانُ بْنُ دَاوُدَ أَبُو الرَّبِيعِ، حَدَّثَنَا فُلَيْحٌ، عَنِ الزُّهْرِيِّ، عَنْ حُمَيْدِ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ أَبَا بَكْرٍ الصِّدِّيقَ ـ رضى الله عنه ـ بَعَثَهُ فِي الْحَجَّةِ الَّتِي أَمَّرَهُ النَّبِيُّ صلى الله عليه وسلم قَبْلَ حَجَّةِ الْوَدَاعِ يَوْمَ النَّحْرِ فِي رَهْطٍ يُؤَذِّنُ فِي النَّاسِ لاَ يَحُجُّ بَعْدَ الْعَامِ مُشْرِكٌ وَلاَ يَطُوفُ بِالْبَيْتِ عُرْيَانٌ‏.‏
Reference : Sahih al-Bukhari 4363
In-book reference : Book 64, Hadith 389
USC-MSA web (English) reference : Vol. 5, Book 59, Hadith 649
  (deprecated numbering scheme)