Musnad Ahmad 695:3

Sufyan ibn 'Uyaynah narrated to us, from al-Zuhri, from 'Urwah, from Marwan and al-Miswar ibn Makhramah—one of them adding to the other—that: "The Messenger of Allah (peace and blessings of Allah be upon him) went out in the year of al-Hudaybiyyah with more than one thousand and some hundreds of his companions. When he was at Dhu al-Hulayfah, he garlanded the sacrificial animals, marked them, and entered into the state of Ihram from there. He sent a scout ahead of him, and the Messenger of Allah (peace and blessings of Allah be upon him) traveled until, when..."