Sahih Al Bukhari Hadith Number 1612

Narrated Ibn `Abbas: The Prophet (peace eb upon him) performed Tawaf of the Ka`ba while riding a camel, and whenever he came in front of the Corner, he pointed towards it (with something).

25  Hajj (Pilgrimage)
Hadith number 1612
Volume no 2
Chapter: 61 (Whoever pointed towards the Corner (Black Stone)