Musnad Ahmad 1208:3

Sufyan narrated to us, saying: "O people, do not kill one another. When you stone the Jamrah, stone it with pebbles the size of a sling-stone." [Abdullah said:] My father said: And it was read to him from Yazid, meaning Ibn Abi Ziyad, from Sulayman ibn Amr ibn al-Ahwas, from his mother, meaning from the Prophet, peace and blessings of Allah be upon him.