Musnad Ahmad 25:401

Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, from al-Hakam, from Ibn Abbas: "The Messenger of Allah (peace and blessings of Allah be upon him) sent off some people from Banu Hashim by night—Shu'bah said: I think he said: 'the weak among them'—and he ordered them not to stone the Jamrah until the sun had risen." Shu'bah was in doubt regarding "the weak among them."