Majma al-Zawaid — Hadith 5564

Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) states: Moving at a fast pace was begun by the Bedouins. They were standing on both sides of the people, and they had hung up sticks, quivers and large bowls. When they set off, those (things) rattled, the animals were startled and a stampede broke out, and the people also set off. Meanwhile, the Prophet (peace and blessings be upon him) was seen, and the ear of his she-camel was touching its neck, and he was saying: "O people! Go calmly! O people! Go calmly!"
Ahmad recorded it, and its narrators are the narrators of the Sahih.