Musnad Ahmad 25:1344

Waki’ narrated to us, Mas’udi narrated to us, from al-Hakam, from Miqsam, from Ibn Abbas: That the Prophet, peace and blessings of Allah be upon him, sent ahead the weak members of his family from Jam’ (Muzdalifah), and he said: "Do not stone the Jamrah until the sun has risen."