Musnad Abu Ya'la al-Mawsili 1:74

Abu al-Rabi' al-Zahrani narrated to us, Fulayh narrated to us, from al-Zuhri, from Humayd ibn Abd al-Rahman ibn Awf, from Abu Hurayrah: That Abu Bakr sent [a group] during the Hajj in which the Messenger of Allah (may Allah bless him and grant him peace) had put him in charge, before the Farewell Hajj, on the Day of Sacrifice, with a group of people to announce to the people that no polytheist shall perform Hajj after this year, and no one shall circumambulate the House while naked.