Language:
كتاب الحج
25  
Hajj (Pilgrimage)
(62)
Chapter: To say Takbir in front of the Corner (having the Black Stone)
(62)
باب التَّكْبِيرِ عِنْدَ الرُّكْنِ
Sahih al-Bukhari 1613

Narrated Ibn `Abbas:

The Prophet (ﷺ) performed Tawaf of the Ka`ba riding a camel, and every time he came in front of the Corner (having the Black Stone), he pointed towards it with something he had with him and said Takbir.

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا خَالِدُ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا خَالِدٌ الْحَذَّاءُ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ قَالَ طَافَ النَّبِيُّ صلى الله عليه وسلم بِالْبَيْتِ عَلَى بَعِيرٍ، كُلَّمَا أَتَى الرُّكْنَ أَشَارَ إِلَيْهِ بِشَىْءٍ كَانَ عِنْدَهُ وَكَبَّرَ‏.‏ تَابَعَهُ إِبْرَاهِيمُ بْنُ طَهْمَانَ عَنْ خَالِدٍ الْحَذَّاءِ‏.‏
Reference : Sahih al-Bukhari 1613
In-book reference : Book 25, Hadith 99
USC-MSA web (English) reference : Vol. 2, Book 26, Hadith 682
  (deprecated numbering scheme)