Sahih al-Bukhari, Hadith 3177 ⓘ
Narrated Abu Huraira: Abu Bakr, on the day of Nahr (i.e. slaughtering of animals for sacrifice), sent me in the company of others to make this announcement: "After this year, no pagan will be allowed to perform the Hajj, and none will be allowed to perform the Tawaf of the Ka`ba undressed." And the day of Al-Hajj-ul-Akbar is the day of Nahr, and it called Al-Akbar because the people call the `Umra Al-Hajj-ul-Asghar (i.e. the minor Hajj). Abu Bakr threw back the pagans' covenant that year, and therefore, no pagan performed the Hajj in the year of Hajj-ul-Wada` of the Prophets.
حَدَّثَنَا أَبُو الْيَمَانِ، أَخْبَرَنَا شُعَيْبٌ، عَنِ الزُّهْرِيِّ، أَخْبَرَنَا حُمَيْدُ بْنُ عَبْدِ الرَّحْمَنِ، أَنَّ أَبَا هُرَيْرَةَ، قَالَ بَعَثَنِي أَبُو بَكْرٍ ـ رضى الله عنه ـ فِيمَنْ يُؤَذِّنُ يَوْمَ النَّحْرِ بِمِنًى لاَ يَحُجُّ بَعْدَ الْعَامِ مُشْرِكٌ، وَلاَ يَطُوفُ بِالْبَيْتِ عُرْيَانٌ. وَيَوْمُ الْحَجِّ الأَكْبَرِ يَوْمُ النَّحْرِ، وَإِنَّمَا قِيلَ الأَكْبَرُ مِنْ أَجْلِ قَوْلِ النَّاسِ الْحَجُّ الأَصْغَرُ. فَنَبَذَ أَبُو بَكْرٍ إِلَى النَّاسِ فِي ذَلِكَ الْعَامِ، فَلَمْ يَحُجَّ عَامَ حَجَّةِ الْوَدَاعِ الَّذِي حَجَّ فِيهِ النَّبِيُّ صلى الله عليه وسلم مُشْرِكٌ.
also referenced under: Book 58, Hadith 19 (In-Book) & Volume 4, Book 53, Hadith 402 (USC-MSA)