Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said: Fast riding was begun by the Bedouins. They would stand on both sides of the people, having hung up their staffs. When they departed, they hurried and rushed the people. And I saw the Messenger of Allah (peace and blessings be upon him), the neck of his she-camel touching the saddle, while he (peace and blessings be upon him) was saying: "O people, keep to tranquillity."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9530