Translation
(25) Hajj (Pilgrimage)
كتاب الحج
(83) Chapter: Where to offer the Zuhr prayer on the day of Tarwiya
(83) باب أَيْنَ يُصَلِّي الظُّهْرَ يَوْمَ التَّرْوِيَةِ
Sahih al-Bukhari 1653 

Narrated `Abdul `Aziz bin Rufai:

I asked Anas bin Malik, "Tell me what you remember from Allah's Messenger (ﷺ) (regarding these questions): Where did he offer the Zuhr and `Asr prayers on the day of Tarwiya (8th day of Dhul- Hijja)?" He relied, "(He offered these prayers) at Mina." I asked, "Where did he offer the `Asr prayer on the day of Nafr (i.e. departure from Mina on the 12th or 13th of Dhul-Hijja)?" He replied, "At Al- Abtah," and then added, "You should do as your chiefs do."

حَدَّثَنِي عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ، حَدَّثَنَا إِسْحَاقُ الأَزْرَقُ، حَدَّثَنَا سُفْيَانُ، عَنْ عَبْدِ الْعَزِيزِ بْنِ رُفَيْعٍ، قَالَ سَأَلْتُ أَنَسَ بْنَ مَالِكٍ ـ رضى الله عنه ـ قُلْتُ أَخْبِرْنِي بِشَىْءٍ، عَقَلْتَهُ عَنِ النَّبِيِّ صلى الله عليه وسلم أَيْنَ صَلَّى الظُّهْرَ وَالْعَصْرَ يَوْمَ التَّرْوِيَةِ قَالَ بِمِنًى‏.‏ قُلْتُ فَأَيْنَ صَلَّى الْعَصْرَ يَوْمَ النَّفْرِ قَالَ بِالأَبْطَحِ‏.‏ ثُمَّ قَالَ افْعَلْ كَمَا يَفْعَلُ أُمَرَاؤُكَ‏.‏
Reference : Sahih al-Bukhari 1653
In-book reference : Book 25, Hadith 134
USC-MSA web (English) reference : Vol. 2, Book 26, Hadith 715
  (deprecated numbering scheme)