Musnad Ahmad 534:24

'Abd al-Rahman ibn Mahdi narrated to us, from Mu'awiyah—meaning Ibn Salih—from Abu al-Zahiriyah, who said: I was sitting with 'Abdullah ibn Busr on a Friday, and a man came stepping over the necks of the people while the Messenger of Allah (peace and blessings of Allah be upon him) was delivering the sermon. He said: "Sit down, for you have caused harm and you have been late."