Mukhtasar Bukhari

Narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that on the day of Arafah, he was traveling with the Messenger of Allah (peace and blessings be upon him) (on the return from Arafat). He says that the Noble Prophet (peace and blessings be upon him) heard a lot of noise and the sound of people striking their camels behind him, so the Prophet (peace and blessings be upon him) gestured towards them with his whip and said: "O people! Maintain calmness, for making the camels run fast is not a virtue."