Musnad Ahmed: Hadith 2187

The first people to hasten when moving on from Muzdalifah were the Bedouins: they would try to remain on the edges of the people so that they could hang up their sticks, large bowls and wooden cups, then when they started moving they would make a lot of noise and the people would start moving. And the Messenger of Allah (ﷺ) was seen with the back of his camel’s ears touching its hump because he was holding it back with the reins) and he was gesturing with his hand: "O people, be calm; O people, be calm.”