Mukhtasar Bukhari (Abridged) 811 — How Raml (jogging) in Tawaf began

Narrated Ibn Abbas (may Allah be pleased with them) that when the Messenger of Allah (peace be upon him) and his companions came (to Makkah for Hajj), the polytheists (before his arrival) started saying among themselves that now a group is coming to us whom the fever of Yathrib has weakened. So (upon hearing this), the Prophet (peace be upon him) ordered them to perform ramal (brisk walk) in three circuits and to walk normally between the two Yemeni corners. And the reason why the Prophet (peace be upon him) did not order them to perform ramal in all the circuits was to make things easy for the people; there was no other reason for this.