Musnad Ahmad 25:244

Waki’ narrated to us, Sufyan and Mis’ar narrated to us, from Salamah ibn Kuhayl, from al-Hasan al-‘Arani, from Ibn ‘Abbas, who said: We were sent ahead by the Messenger of Allah (peace and blessings of Allah be upon him)—we were young boys of Banu ‘Abd al-Muttalib—on our small donkeys from Jam’—Sufyan said: at night—and he began to pat our thighs and say: "O my sons, do not stone the Jamrah until the sun rises." And Sufyan added, Ibn ‘Abbas said: "I do not think anyone who is rational stones [the Jamrah] until the sun rises."