Musnad Abu Ya'la al-Mawsili 162:19

Abu Bakr narrated to us, Affan narrated to us, Shu'bah narrated to us, from Mushash, from 'Ata', from Ibn 'Abbas, from al-Fadl ibn 'Abbas, who said: The Messenger of Allah (may Allah bless him and grant him peace) commanded the weak ones of Banu Hashim to depart from Jam' (Muzdalifah) by night.