«طَافَ النَّبيُّ - صلى الله عليه وسلم - بِالْبَيْتِ عَلَى بَعِيرٍ كُلَّمَا أَتَى الرُّكْنَ أَشَارَ إِلَيْهِ بِشَيْءٍ عِنْدَهُ وَكَبَّرَ».
The Prophet (ﷺ) performed Tawaf riding a camel. Every time he passed the corner (containing the Black Stone), he would point to it with something that he was holding and say:Allāhu Akbar (Allah is the Most Great)!
SourceAl-Bukhari, cf. Al-Asqalani, Fathul-Bari 3/476. See also 472. The 'something' that was referred to in this Hadith was a cane.