Sahih al-Bukhari 4657

Narrated Humaid bin 'Abdur-Rahman:

Abu Huraira said that Abu Bakr sent him during the Hajj in which Abu Bakr was made the chief of the pilgrims by Allah's Apostle before (the year of) Hajjat al-Wada in a group (of announcers) to announce before the people;
'No pagan shall perform the Hajj after this year, and none shall perform the Tawaf around the Ka'ba in a naked state. Humaid used to say The Day of Nahr is the day of Al-Hajj Al-Akbar (the Greatest Day) because of the narration of Abu Huraira.

حَدَّثَنَا إِسْحَاقُ، حَدَّثَنَا يَعْقُوبُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا أَبِي، عَنْ صَالِحٍ، عَنِ ابْنِ شِهَابٍ، أَنَّ حُمَيْدَ بْنَ عَبْدِ الرَّحْمَنِ، أَخْبَرَهُ أَنَّ أَبَا هُرَيْرَةَ أَخْبَرَهُ أَنَّ أَبَا بَكْرٍ ـ رضى الله عنه ـ بَعَثَهُ فِي الْحَجَّةِ الَّتِي أَمَّرَهُ رَسُولُ اللَّهِ ﷺ عَلَيْهَا قَبْلَ حَجَّةِ الْوَدَاعِ فِي رَهْطٍ يُؤَذِّنُ فِي النَّاسِ أَنْ لاَ يَحُجَّنَّ بَعْدَ الْعَامِ مُشْرِكٌ وَلاَ يَطُوفَ بِالْبَيْتِ عُرْيَانٌ. فَكَانَ حُمَيْدٌ يَقُولُ يَوْمُ النَّحْرِ يَوْمُ الْحَجِّ الأَكْبَرِ. مِنْ أَجْلِ حَدِيثِ أَبِي هُرَيْرَةَ.