Sahih al-Bukhari 1613
Sahih al-Bukhari · Book 25: Hajj (Pilgrimage) · To say Takbir in front of the Corner (having the Black Stone)
Narrated Ibn `Abbas:
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 .
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.