Musnad Ahmad 33:255

Ibn Numayr narrated to us, Ash'ath narrated to us, from Abu al-Zubayr, from Jabir, who said: "We performed Hajj with the Messenger of Allah, peace and blessings of Allah be upon him, and with us were the women and the children. So we recited the Talbiyah on behalf of the children, and we performed the stoning (of the Jamarat) on their behalf."