Sahih Al Bukhari Hadith Number 1604

Narrated `Abdullah bin `Umar: The Prophet (peace eb upon him) did Ramal in (first) three rounds (of Tawaf), and walked in the remaining four, in Hajj and Umra.

25  Hajj (Pilgrimage)
Hadith number 1604
Volume no 2
Chapter: 57 (Doing Ramal in Tawaf during Hajj and ‘Umra)