Musnad Ahmad 25:569

Mu'ammal ibn Isma'il narrated to us, Sufyan narrated to us, from al-A'mash, from al-Hakam, from Miqsam, from Ibn Abbas, who said: The Messenger of Allah (peace and blessings of Allah be upon him) departed from Arafah, and he commanded them to maintain tranquility. He had Usamah ibn Zayd ride behind him, and he said: "O people, you must maintain tranquility and dignity, for righteousness is not in the rapid driving of camels and horses." I did not see a single she-camel raising its foreleg in a gallop until he reached Jam' (Muzdalifah). Then he had al-Fadl ibn Abbas ride behind him from Jam' to Mina, and he was saying: "O people, you must maintain tranquility and dignity, for righteousness is not in the rapid driving of camels and horses." I did not see a single she-camel raising its foreleg in a gallop until he reached Mina.