Sahih al-Bukhari 1632
Narrated Ibn `Abbas:
Allah's Messenger (ﷺ) performed Tawaf (of the Ka`ba) riding a camel (at that time the Prophet (ﷺ) had a foot 
injury). Whenever he came to the Corner (having the Black Stone) he would point out towards it with 
a thing in his hand and say, "Allahu-Akbar."
حَدَّثَنِي إِسْحَاقُ الْوَاسِطِيُّ، حَدَّثَنَا خَالِدٌ، عَنْ خَالِدٍ الْحَذَّاءِ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم طَافَ بِالْبَيْتِ، وَهْوَ عَلَى بَعِيرٍ، كُلَّمَا أَتَى عَلَى الرُّكْنِ أَشَارَ إِلَيْهِ بِشَىْءٍ فِي يَدِهِ وَكَبَّرَ‏.‏